1 definition by Peter Mings
(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."
"All that guy is is a cum pump."
(After casual sex with anonymous partner)
"God, I'm such a cum pump."
by Peter Mings February 5, 2008