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1.
An amusing synonym for debris. Also, a word to describe someone who is too smart to be a dumbass, and too dumb to be a smartass.
"Woah, man, did you hear what that dude just said?
"Yeah..what a piece of derbis."
by manduh-le-panduh February 23, 2006
 
2.
derbis: the singular form of debris.
donnie is about to throw a chunk of derbis at andy, because andy is stupid.
by SOUL January 27, 2004
 
3.
a large singlular chunk of debris, made of shit.
Andy is a derbis head.
by SOUL January 27, 2004