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6.
(noun, adverb/adjective)
'b-leh

1 to greet or acknowledge, but only slightly
2 to express sentiment or mood, but only slightly

Not to be confused with blah the term bleh is generally utilized as a conversation deterrent. Oftentimes people find themselves at the mercy of a conversation they do not wish to participate in. This predicament is typically initiated by a person greeting another or by a person answering a question regarding their general state of health/well being with what might be called a conversation initiator. For example, if person A were to ask person B how he/she is doing, the answer might take the form of an unwanted 30-minute conversation. It is in situations like this, where there is pressure to acquiesce a measure of social etiquette with a response but insufficient time/desire to address the situation with the full answer as would normally be offered that we have use for this term. In definition 1 then the implied sentiment, if transcribed, would be, "I acknowledge that you still exist...that's great...good work...I'd love to take the time to greet you properly but I simply cannot at the moment." (Note: it's possible that, in fact, you would not love to take the time to greet that person properly; in any instance)

Regarding definition 2, intonation is an important variable. Again the same theme of deterring a conversation is at heart, but in the interests of satisfying social etiquette the term may be used with varying intonation to reveal some extra detail as to the person's sentiment/mood. A short descending tone might, for example, reveal anger (another reason why you should not try to have a conversation with that person), while a stretched monotone might be used to express boredom or discontent. With experience this term can come to have a variety of specific meanings when accompanied by a mastery of its applicable intonation.
Mike: "Hey John!"

John: "Bleh."

by pharass April 26, 2006
 
15.
Term meaning lack of interest
John: Yea so what do you think of lauren? she likes you

Sabastien?: bleh?
by Two gun tex March 14, 2007
 
16.
Bleh is synonym of Blah. Bleh is the word you say when you're frustrated, or when you feel like puking. Or just when you're bored.
Some people use it as an adjective, like in "I feel so bleh"... It this case, it means that the person is in a mood to say "bleh".
-Bleh!
-you're so bleh
-I'm gonna bleh
-Bleh, bleh, why me?
by Blehage March 11, 2006
 
17.
A word used when someone just gives up on what they are going to say
It was like, like, like... Bleh.
by Raddichio December 23, 2004
 
18.
An ending word, usually used to express failure in speaking a word
I am trying to learn sophisticater.. sophisticatser.... siphosticated... bleh! (technology).
by Walker-Around-The-Town August 13, 2013
 
19.
What you say when you have nothing to say.
Me: Heyy.
You: Bleh.
by Acire May 31, 2007
 
20.
another word for meh- meaning you don't really give a shit
:Wadda ya havin for tea bradda
:Bleh!!!
by Sam McKinnon August 29, 2006
 
21.
Feeling fucked up but can't really be put in words. To express disgust, irritation, annoyance. To not give a fuck.
Could this day get any worst! BLEH!!!
by karayjinx January 25, 2014