look up any word, like pussy:
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
by Rehtonaetrof October 23, 2007
4 7
something you would say when you barf
BLAHHH!!!!!!! im hella barfing!! BLAHH!!
by F.Garcia October 27, 2002
8 11
A blah is another name for rolled up Cannabis. It is made from the plant Cannabis Sativa. It's intended purpose is for use as a psychoactive (mind-altering) drug.

The main psychoactive ingredient in a blah is THC (delta-9-tetrahydrocannabinol), but more than 400 other chemicals also are in the plant.

Immediate physical effects of a blah include a faster heartbeat and pulse rate, bloodshot eyes, and a dry mouth and throat.

A blah is normally made by taking a cigarette and replacing out the tobacco with cannabis. A blah can also be made by using rolling paper and a filter.

It is common practice to smoke a blah in a group and follows the concept of puff-and-pass.
1. That blah got me so high!

2. Yesterday, i smoked a blah with my friends.

3. We took the weed out the blah and put it in the pipe instead.
by The Fish Who Cannot Be Found September 15, 2010
1 5
when one is severely blazed
"Yo, I'm mad blahed right now"
by Nalex May 13, 2009
6 10
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.
by jrizz blizz February 16, 2009
5 9
Local Boston slang, meaning "stoned".

Can also be modified in any appropriate way.
I was mad blah for my college interview, I don't think they noticed.

I blah-ed before the concert, it made it that much more sick!

Yo, you blah?

No, let's go blah!

by the next jazz sax great March 22, 2008
4 8

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..."
by F.Arkov June 27, 2006
4 8