To masturbate and allow the sperm to stream down ur dick, leaving it until it dries then fucking a girl.
Dude, I was wanking hard last night until my girlfriend called me and said she wanted me to come over. At first I was a little pissed, but then I decide to just give her a crusty willie.
by J I Z Z L E March 16, 2009

When someone puts melted marshmallows where the sun don't shine. After the sticky surprise melts you have a crusty Michael.
by monkeehumper69 November 21, 2010

i didn't clean my butt well after having explosive diarrea, and now i have a bad case of butt crusties.
by Allen T. McIntosh III April 26, 2003

by Allybugjr April 22, 2017

The act of ejaculating on a females butthole, then waiting on her to fart causing a massive cum bubble on her asshole. It's all about timing.
by Bizzle, Cookie, and Timmy December 21, 2008

a dick and or its balls that have been covered in jizz and left to dry without cleaning, resulting in a crusty residue all over the genitals.
by John Lindley January 7, 2008

when someone had anal sex with another and ejaculates and leaves it in there until it gets nice and crusty around the anus.
by c baldwin June 22, 2007
