The act of using ones own self defecation in a frantic episode of self gratification (masturbation)
"After sharting, Steven decided he wanted to make the best of a bad situation and decided to partake in a session of shit palming"
Some palm colored people behavior(s)
Tray and Reno are walking down the street and see a anti-everything protest.
Tray: This is some palm shit.
Reno: Bro what is palm shit
Tray: You not knowing is some palm shit too.