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
Probably the deadliest gang you will find in a middle class area saufth of London. RH12 3WT has ruthless members, all with their own special manovres. MUG!
by oh that lepperty December 30, 2007