Meme lingo for "why you no..." which means "why didn't you" or "why don't you" in standard English. The cartoon meme character known as "Y U No Man" always uses this phrase in his frustrated questions.
Meme character holds his stick arms pleadingly in front of his large, sweaty face and says: "Jim Carrey...Y u no funny anymore?" Y U no?
by Black@Heart February 6, 2011
A term used to spam Maplestory forum threads such as those on Basilmarket. Frequently used when the poster has nothing better to say or randomly accuses the thread starter of hacking for a valid or invalid reason.
1. Joe: OMGz my Maplestory wont start all I get is black screen wtf!!1!1one
Bob: "y u hek?"
2. John: Private servers suck Nexon ban them pl0x
Bob: "y u hek?"
Bob: "y u hek?"
2. John: Private servers suck Nexon ban them pl0x
Bob: "y u hek?"
by John Doe Jr. May 23, 2008
Person 1: God I am so pissed off right now. This damn thing doesn't work right!
Troll: Y U MAD?
Person 1: FUUUUUUUUUUUUUUU!!!!
Troll: Y U MAD?
Person 1: FUUUUUUUUUUUUUUU!!!!
by ChillBilly75 December 16, 2011
A term used in a lot of MMORPGs. it is often used towards a large amount of wins or a fast beating. The losing player will say, "Y u hekk?" meaning, "Why do you Hack?" This is pretty much admitting defeat.
by PeacockJulia December 19, 2008
When someones thinks you are an idiot and tries to insult your intelligence by telling you a ridiculous lie.
by rosesharpe1 September 11, 2009
y u bulli mi
by Blehman12350 December 3, 2018
by Fap October 7, 2003