Ken: "What, is she like your girlfriend now or something?"
Chad: "Naw man, it was just a pump and dump scenario. I've got a date with Buffy tonight."
When a man has sexual intercourse with a woman, and then breaks up with her (if they are in a relationship) or never speaks to or makes contact with them again after the aforesaid act.
Ollie:- Yeah, I did that fit girl from Wells Hall. She was so good. She know's how to f**k.
Tom:- Did you get her number?
Ollie:- Naa, I just pumped and dumped her. What's her name again?
Tom:- You're such a man slag. You allways pump and dump