Top Definition
Masturbation or causing male ejaculation by hand
No she didn't let me hit it, but she did given me a good ole' fashioned hammer pump, so at least I slept well.
by N. VonBachbeater September 20, 2006
6 Words related to hammer pump

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.