Top definition
n. The noise you would expect your grandpa to make when orgasming.
v. The act of making grandpa's orgasm noises during intercourse when your mate least expects it, in an attempt to completely eradicate their sex drive.
--Bro, I'm trying to figure out how to get rid of Kaya. She's so clingy I might just have to grandpagasm that bitch.
by Zmackdavis April 29, 2015
Get the mug
Get a grandpagasm mug for your mama Sarah.