Spert

The action of releasing sperm from the anal canal while farting. Normally the sperm gets there via anal sex. Sperting may occur multiple times within the first 24-48 hours after the sperm has been ejected into the anus.

*Jane lets a fart rip*
Jane: oh fuck I think I just sharted in my panties.
Jack: are you sure? I did cum inside your anus while we were buttfucking last night.

Jane: ah right, then it was just a spert.