Top definition
(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."
by Peter Mings February 05, 2008
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug