Shit Risk 

The likelihood that the receiving partner in anal sex will defecate onto the penetrating partner.

"I don't know dude, she had Taco Bell, the shit risk is pretty high."

Shit Risk by Misanthropic Bong December 9, 2015

Shit Risk 

When you take laxatives and take the Shit Risk by challenging yourself to hold it in whilst getting fucked in the arse

“I took loads of laxatives last night to try the Shit Risk but failed to hold it in and shat all over his dick.”

Shit Risk by MissBlob September 2, 2019