Nonsense words used in English to show speech without the contents having any importance

Blah blah blah is the language my last girlfriend spoke after our first year of dating.

when something gets really boring all that you hear is blah blah blah

What most students hear in school
They just zone out, and all they hear from the teacher is Blah Blah Blah

Used to describe a situation or circumstance to which the other person in the conversation is familiar or can anticipate, thus negating the necessity for a detailed and time consuming desription. ,'n shit,yak yak yak,talkin' shit

blah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blah hi blah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah 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blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahblah blah blah blah blahvv

A common slang phrase in America used to describe a continuation of thought and expression. Initially replacing the Latin "Et cetera", which turned into "etcetera", which abbreviated to "etc." and no one knew what it meant anymore, it was quickly replaced with the emphatical "blah blah blah".