Definitions by Horny Middle Schooler

I.m.p. 

Pronounced as 'imp' it means "Instant Massive Penis". Refers to a very quick erection.

Dude, she totally I.m.p.'d me!

Aw crap, just got an I.m.p.!

I.m.p. by Horny Middle Schooler July 27, 2010