Definitions by Peter Mings

Cum Pump 

(noun): A male human with little or nothing to offer society aside from the opportunity for copulation with a similar member of the opposite sex.

"Why is she with him...can't she see he's a cum pump?"

"All that guy is is a cum pump."

(After casual sex with anonymous partner)
"God, I'm such a cum pump."

Cum Pump by Peter Mings January 11, 2009