u bum is the only insult you will ever need to use. It is a revolutionary term used by Lebron James and can be used by you too. that's how you that you're know your a cool kid. Wanna be a cool kid? then use the term U BUM.... your welcome....
Donald Trump: *** tweets something***
LeBron James: ... u bum.
by #BeLikeBob November 15, 2018
Get the u bum mug.
(I honestly don't even know. I think It means:) You're fake or you're stupid
Donald Trump: You guys are not invited anymore to my party

Lebron James: U bum
by ajshdndnsk September 25, 2017
Get the u bum mug.