blah 

a word oftentime used out of sheer randomness, other times used to substitute for other words you don't want to say or really don't have a word for, can also mean dull or boring

"How was your day today?"
"It was very blah."

blah by bloodyangelz0 December 19, 2003

blah 

To smoke weed, plain and simple.

Ben: Let's go blah!
DJ: Word, I got the bong and the bomb tree.

blah by Lylef May 3, 2009

blah 

when one is severely blazed

"Yo, I'm mad blahed right now"
"Word"

blah by Nalex May 13, 2009

blah 

blah

blah blah blah.

Waffling. Talking shite or bollox or bullshit

All the other definitions on this page for this word might as well read "blah blah blah..."

blah by F.Arkov September 1, 2008

Blah 

The Act of Blazing. The "AH" in blah replaces azing. This is commonly used to code the word blazing. In belmont MA.

Lets go blah

yo tryna blah?

Who did you blah with?

Soo blahed.

Blah by jrizz blizz February 16, 2009

Blah 

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"

Blah by Neverlution March 3, 2010

blah 

You can say blah when you don't care about something.
You can say blah when someone talks to you and you're doing something completely different.
You can say blah to ignore things that happen around you.

Moderator: You do know that evasion of known wordfilters will eventually result in deletion?

Member: Blah, w/e

blah by Rehtonaetrof November 8, 2007