addition: This phrase was coined by Cam'Ron on the Bill O'Rielly show. The Harlem-bred rapper used it, when Bill began to get upset to further piss him off.
A popular phrase among internet users or gamers, usually in response to another's anger or misfortune. Also considered as a form of trolling, due to its potent nature.
Other similar phrases include, 'u mad breh?' 'why u mad?' and, a personal favorite, 'LOL WHY U FOAMIN, BREH??"
**When trolling, it is advisable to type in all capitals and use a large amount of spelling errors. What will piss someone off more: You mad, or LOL U MAD?**
Rager: 'u mad' is a dipshit response when some sissy kiddy on the net can't respond because he don't accept his ghey self.
An attempt to mock someone for being angry or annoyed, often used by trolls or just dickheads in a cheap attempt to make their target more angry.
This response is usually predicated on the questioner's arrogant notion that they themselves are immune to losing their cool and never get angry when someone is being a dickhead to them.
This usually has 0.000001% likelihood of being true.
Possible response: "Yes, I mad, and if you weren't hiding behind an anonymous identity on the Internet, I'd find you and let you know just how mad I am."
Person 1: "Stop fucking micspamming and hacking you fucking dickcheese!"