To have sexual relations with another person’s Grandmother (usually leading to criminal sexual assault charges).
Andriy: Yo u tryna get fucked up today? Cop some valid shit
Eugene: yea aight how bout I grandpa your grandma?
Nick: niggas gonna grandpa your grandma…
Eugene: yea aight how bout I grandpa your grandma?
Nick: niggas gonna grandpa your grandma…
by John Baione June 6, 2022

When someone's grandma has cheese in her tits instead of milk because when the milk goes bad it turns to cheese.
by Fag Bag Mcgee March 15, 2020

Whats your grandma's dark secret smoking weed in a dark ally with some black guys or being stared in a porno with a black guys house dick? And by the way I don't want to know.
by Bob McRoss December 5, 2016

When one soaks their hand in icy cold water til it's wrinkled and pruny then pleasures themself with it.
by Guilty7 October 6, 2017

man: daaaamn jamal i need some of grandma's nanner smasher before that old bitch passes
jamal: ill fucking kill you dude
jamal: ill fucking kill you dude
by schizomode July 15, 2022

A sentence used by celebratory faces in lessons such as Math to insult people they admire or are attracted to. This statement can mean the person would like to smell underwear belonging to who it is aimed at.
by almanjam February 7, 2009

When you completely want to destroy your opponent and "ur mom gay" and "ur dad a lesbian" wasn't enough.
you: ur mom gay
foe: no u
you: ur dad a lesbian
foe: *ded* no U!
you: ur grandma is trans
foe: *stops reincarnating*
foe: no u
you: ur dad a lesbian
foe: *ded* no U!
you: ur grandma is trans
foe: *stops reincarnating*
by fantomsloth March 10, 2018
