The guy who was Gengis Khan's best friend and lover (for more information, check The Secret History of the Mongols), but Jamooka pulled some shit pissed him off and Genghis killed him. To be used whenever someone does something fucked up to a friend.
You fucked my brother? Bitch move, Jamooka.
by nutella May 06, 2007
Can you define these popular missing words?