Definitions by Benjamin Liu

Crumbfuck 

n.,v. An act of anal-intercourse with someone who has not wiped their ass properly, thus forming a crusty brown layer over their anus, which crumbles with each thrust.

n. "The old homeless man was a good crumbfuck"

v. "I will crumbfuck my little brother tonight."

Crumbfuck by Benjamin Liu November 26, 2003