UDG = "U DUM GAI"
Next level insult used to make fun of people when they say something stupid, cliterally.
CoolCat: "HANDS UP! I'LL GIVE YOU WHATEVER YOU WANT! PLEASE DON'T KILL ME!."
CoolCat: ...no, cyanide. so dumb UDG
Teacher: Rad you ready to hand it in?
Rad: No! im not ready. its due tomorrow though right?
Teacher: :S ?