Pump-and-munch 

A threesome, male female female.

Hey angel, want to join megan and mike for a pump-and-munch?

Pump-and-munch by Dr Rock June 11, 2006

pump-and-munch 

The act of rushing through sex, to the extent of sometimes even faking an orgasm, so one can eat some food when one has the munchies.

Dude, I was so high last night, I totally pump-and-munched with Amber.

pump-and-munch by DgA May 15, 2007