When one makes an obscure and complete distortion of the facts to his acquatances or disriguard of one others statement by exclamating the word "BLAG" making a mouth with one hand and moving them in a vertical motion. A bender chat only uses two fingers and a thumb.
Person one: See that bird over there? I so totally shagged her.
Person two: Yeah I believe you... BLAG!
Person two: Yeah I believe you... BLAG!
by oh that lepperty December 30, 2007

blag is where someone can be concidered lying, in a big headed way. or in such a way it is hard to beleive what they are telling you...
by Alexg June 5, 2005

by Amanda August 25, 2004

A Black Bag. Typically when you buy something questionable, you will receive it in a black bag...a blag.
by a.snod August 4, 2009
