look up any word, like sapiosexual:
 
1.
The Excess Built up Ash, and unburnt Kush in the bong water.

(Which when trying to dispose of forms a "mush" like substance)
AHH SH*T! I WAS TRYING TO CLEAN THE D*MN BONG AND I GOT THE KUSHMUSH ON MY NEW SHIRT!
by Dr.Pseudonym December 30, 2010