To strike with the fist.
...may not score a point with his open hand(s), but may score a point by fisting the ball. Damian Cullen. "Running the rule." The Irish Times 18 Aug 2003, pg. 52.
To close (the hand) into a fist.
To grip with a fist.
To fist-fuck.
To break wind.
(in combination) Having some specific type of fist.