Top Definition
Fuck a girl with your cock, hence the pump. Once the vagina is dilated, fart in the orifice. Hence the gas. Michigan, because that's where my last girlfriend was from.
Girl: I'm from michigan

Guy: Can I give you a michigan gas pump?

Girl: Only if it is high octane.
by krautmonkey December 19, 2013
Free Daily Email

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

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×