Top definition
After having anal sex with an old woman, she shits on your dick and then sucks it off. (Not to be confused with the Moist Keith when its a young woman.)
Eric: Dude, your mom's breath smells like shit!

Thomas: Yeah I know, she just gave my dad a Crusty Keith.
by hobojoe017 June 08, 2011
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Jul 2 Word of the Day
Someone people turn to when they're sad who makes them feel better.
Dude, I was so unhappy about my girl, until I spoke to my serotonin donor who really helped me feel better
by jonfurstn1 November 27, 2009
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