keshet

To involuntarily defecate while ejaculating.

Caused by the total release and lack of control that happens during orgasm. Can apply to both males and females although it is more commonly associated with males.

Past tense: keshat
Gerund: keshetting

We're never hooking up again! He always keshets after I've put clean sheets on the bed. Unless he wants to bring his own sheets, we're through!