During anal sex, you pull out and rub your cock across the top lip of your partner. thus giving her a mustache.
by Sven Ibn Lint Ball February 7, 2009

An act characterized by the fingering of the ass and the giving of a "thin shit moustache." Not to be confused with the dirty rodruigez.
by dirty_bird November 21, 2006

by faggothole123 March 4, 2009

by Desire Deeds September 20, 2020

by Sabrrina carpenter April 14, 2020

Heard it on the daily show, and decided to come up with a definition for it. A dirty toothbrush is when a man has anal sex with his partner and then takes his penis and rubs it on his partners teeth.
by Yatin Shastri April 29, 2008

When A guy named Austin puts grape jelly on his penis to act as lubricant. Then uses his grape jelly flavored penis to have sex with an old 80+ yr old woman, then has her suck the rest of the jelly off after he cums in her face infront of her grandchildren.
Austin: oh you are watching your grandkids today; you have any grape jelly?
Old lady: yes.
Austin. Good spread it on my dick so I can give you a dirty August.
Old lady: yes.
Austin. Good spread it on my dick so I can give you a dirty August.
by DJ Lyle May 25, 2019
