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?**
Gamer: u mad.
*Rager has disconnected*
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 2: "Lol u mad?"
Person 1: "..."
(a few days later)
Person 2: " YOU KILLED MY FAMILY AND BURNED MY HOUSE DOWN! YOU BITCH!"
Person 1: "lol u mad?"
A form of gaming trolling with the intent to anger another player into behaving childishly. Esp. with the intent to get them to Ragequit.
N00bx69: fuck u fggt!
N00bx69 has disconnected
Jerry: Did you topdeck that graceful charity into two goldds and a CS to attack into my reaper for game?
Random Scrub: U mad?
Sammy/nick/ygo community: Why are you so much better than me, michael?
Michael: U mad?