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".
"I wasn't sleeping right, the breathing strips didn't help, blah blah blah...so I got drunk and took Theraflu and Nyquil."
by Spazman5190 February 20, 2016
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Blah Blah Blah is another way to say I love you.

Wife: Blah Blah Blah
Husband responds: Ditto

Husband says: I love you
Wife playfully says: Blah, Blah, Blah !
Why does your wife leave you a slip of paper in your lunch that says "Blah Blah Blah" everyday, does she think you talk to much at work? No, that's just her way of saying I love you.
by Yaunti December 16, 2018
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Information, text, or a document that the writer is too lazy to describe in detail or is too long to summarize quickly.
"Please read the attached draft blah-blah about Sales & Marketing."

"Check out their web site and the blah-blah about the trade show."
by The Frow January 20, 2012
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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 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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 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o sup guys?
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 blah
by Dr. Corwley May 17, 2009
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What people write when they've lost a conversation or been proven wrong on the internet and have nothing credible left to write.
Person: I think the Earth is flat.

Astronaut: I have literally been to space and circled the planet. I can tell you first hand that it is a sphere.

Person: Blah blah blah.
by Hawk_driver December 28, 2017
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Blah blah blah is the plural of blah, because 'blahs' just doesn't sound right.
When I stop listening to someone who is talking, all I hear is 'blah blah blah'.
by DefinerOfTheObvious May 20, 2015
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1.) A stand-in all-purpose term for BORING DETAILS in a story.

2.) A (mumbled) substitution for some bit of information as a DODGE or a FAKE-OUT or as if the proper answer were too burdensome to speak. Used to avoid answering; or, as in "WHATYAMACALLIT" or "WHOSIT".

3.) An all-purpose REPLACEMENT for any WORD or NAME or such that is tacitly understood by those communicating. It is used to avoid actually having to say the "thing" that might not be cool for others to hear or know about i.e., in telephone conversations of a sensitive nature, in uncomfortably crowded places like elevator or subway.

4.) Similar to Hawaiian slang: "DA KINE" meaning practically anything for (lazy) convenience and loaded implicitly by context.
------------------------------ - -------------------------------
EXAMPLES:

1.) "Well, ... first we registered and paid admission ... BLAH BLAH ... And then the band came out just as we hit our seats. Shiz! It was the awesome almighty."

2.) HOMEY: DJ D'lish, who dat ho in d'caw wif you lass night?
DJ D'LISH: Aohh, that was just *(sometimes mumbled)* BLAH BLAH's sister, Homey. Ain't nuffin' to it, son.

3.) "So remember the plan, dog. Wait for BLAH BLAH to do his thing. 'Ite?"

4.) "Bra' man, ya got a lead on some BLAH BLAH? Yo, Cuz, I am bone-dry!
by Bongo Cholomongo September 20, 2006
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