by ooRLYoo November 09, 2008
A phrase which describes the low/ almost non existent intelligence level of someone. In other words, this phrase means the person directed at is stupid, dumb, and totally moronic.
Lanbo: "Dude, do you know what 1+1 equals?" MOnkeys85: "Are you stupid? It's 85!" Lanbo: "ur dum! MUD RU! it's 2!"
by battle_asx552 November 09, 2008