When you stick one side of a tube in your ass and the other side in your partner and shit back and forth from ass to ass.
I gave my bitch a Shit Transfer cause she was biting.
by Matt James 4123 May 22, 2006
1 more definition
Not to be confused with "Shit x-fer", this act of sensuality is where two willing parties align their anuses tightly, and one transfers shit directly into the other's anus.
Every Tuesday afternoon, Brian would skip over to Jason's house for his weekly Shit Transfer Gay.
by The Instructor November 14, 2007