The action of using your dick to wipe your cum on a part of your partners body, in a similar fashion to how you spread butter with a knife.
by ElevenOsix June 2, 2018

by Ao10110 September 27, 2021

Knifes is a Yiddish slang word for when you spell knives wrong and try to cover it up by making your own definition in urban dictionary
by Shmendric September 21, 2023

by Charles the lesbian March 15, 2020

"My partner talked me into trying the subterranean kitchen knife in the bedroom, our relationship will never be the same."
by brainstorm-with-friends August 12, 2017

When you put a used butter knife halfway over the rim of the sink just in case you might need it for another sandwich, but you never know.
Dude its 2 AM and your Schrödinger's Butter Knife could drop at any moment, hurry up with your snacks before mum and dad will kill us
by 1m1m0 March 10, 2024
