Most formely it is a street term pertaining to something that is undescribably wack or messed up... Spelt with a k and a z because it is the cooliest term around!
A guy: Man that guy's girl is krumz!

Another Guy: Fo sho man someone should tell her she's got crumbs on her shirt..

A guy (again): No man I mean she's krumz, like undescribably wack...

Another guy (once more): Oh thats the cooliest word ever! I'm gonna use it all the time now! And so should you *points towards random guy*

Random Guy: Okay....
by Irish_Laddi March 18, 2009
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