"umad" isn't a valid insult 99.99 percent of the time its thrown around.
"hey dude can you clear your spam"
"lololol y, umad?"
"hey look of those bags of richards using the cornerjump glitch"
"ogm lol someones mad hehe"
"dude can you stop blocking the doorway"
"stop being so mad bro"
This should stop. All it shows is how much of an idiot you are.