Top definition
A busted load of jizz all over your fingers after rubbing one out.
Hand me my gak towel. I need to wipe up this knuckle custard.

I apparently didn’t wipe my hands good after jacking off this morning. I still got knuckle custard on them.
via giphy
by Eaton Holgoode May 11, 2018
Get the mug
Get a Knuckle Custard mug for your cousin Manafort.
Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
Get the merch
Get the jabbed neck gaiter and mug.