An acronym of Boredom, Lassitude, Apathy, and Halfassidness referring to states of mediocrity and suckitude.
The daily grind of working for The Man has Mary Louise walking through a haze of blah.
by Eclecktic1 October 18, 2010

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a verb which is also an acronym

B- Blatantly
L- LA'ing
A- Aloud
H- Happily

(you say LA like the stereotypical little girls skipping down the street back in the 80's-90's going lalala)
"Why is that girl all happy and LA'ing to herself over there?"
"Eh, guess she's BLAH'ing"
by AMOR-AYYY :D May 02, 2010

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a word that pops in your head when your teacher talks. or ur parents or ANYONE BORING (:
Teacher starts talking about math...
Annie hears blah blah blah blah blah blah blah
by annie linendoll January 10, 2009

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a word used to describe somthing when you have no idea what to say; Or to descride when your massively bored ;
Like omg im just like well she doesnt cause that make drama ..... "noo are you dumb shes so ..... so ..... so ......uhhh <b>Blah

Heyy how are you "Blahhish"
by Suany March 29, 2008

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1. an adolescent that does not seem to display any signs of a real personality

2. the opposite of an ogre - a person with no layers
"Margaret, will you please go find yourself a characteristic other than BLAH?"
by Alexa&Molly January 19, 2006

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An acronym secretly meaning Badly Lacking A Hobby. Used by no lifers who live a very sheltered life.
"Theres nothing to do today, i'm so blahhhhhhhhh"
by Neverlution March 03, 2010

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the most amazing word which can be used for absolutely anything
i feel so blah
by ashwini vijayakumar November 10, 2009

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The Urban Dictionary T-Shirt

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