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5.
If someone says theyre random, you go "No, ur ranDUMB!"

HAHAHAHA SO FUNNY n00bz0r
I R RANDOMEST UV ALL j00 NUBS!

You mean randumbest?

Everyone - OHHHHHH PWND!
by pwnz0r September 19, 2003
 
1.
Usually referring to when someone wants to be random, but just ends up looking really, really stupid.
Jorge : I LET THE DOGS OUT! CHEESE + MAYO = MORTGAGE! OLOLO
Hernandez : Dude, you're totally randumb, stop trying.
by CriticalDesign January 13, 2008
 
2.
Spontaneous stupidity.
"He probably thinks it's funny when he breaks into the 'berries and cream' dance, but everyone else thinks it's so randumb.
by Evelynne December 01, 2007
 
3.
When something or someone is so random, Its DUMB
Mike: I went to the store this weekend and went up to the cashier and went "You suck a duck", It was so random it was funny

Jon: Thats not random......thats just ranDUMB
by Kurt Jurgens July 30, 2007
 
4.
someone who is unknown, and they want to be notoriously well known.
ex1. Kid no one knows who are you are your such a randumb.

ex2. These guys are a bunch of randumbs
by hasselhoffman February 20, 2009
 
6.
A girl you've never met before, you holler at her, and you're in her guts that very night.
Let's go to the mall and holler at some randumbs.
by Apocolypse April 30, 2004