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1.
A more advanced game of soggy biscuit. The biscuit is first shat upon, usually by a random member of the group, then the participants can begin as normal.
Rick: "Man, I got stuck with the Chili-biscuit last night!"

Adam: "You need better things to do."
by AdamRickF&F January 26, 2010
 
2.
When you shit in a bitches cunt.
Patrick: I can't believe you fucked that bitch last night.

Cummings: No worries I gave that hoe a chili biscuit.

Patrick: Noice.
by NomNomBiscuit September 25, 2011