A term referring to the sticking of your thumb up a woman(or man) for sexual pleasure, calling back to Kentucky Ballistics .50 BMG accident, were his life was saved by his thumb. This term was popularized after the May 20th 2021 installment of gun meme review hosted by Brandon Herrera
by imadeanaccountjusttopostonce May 20, 2021

by Hairerra May 20, 2021

by Durban Bictionary May 20, 2021

When you're nailing your sister from behind and you slip in the back "accidentally" so you shove your thumb in her asshole so blood doesn't get on your bed.
Had an accidental intrusion with sis last night and had to give her the Kentucky thumb to keep the sheets clean
by Imprezaraptor May 20, 2021

by #65 May 20, 2021

Using your thumb (primarily someone from Kentucky) to plug any holes on the human body whether in sexual or non-sexual context.
Brandon: Hey Scott, I gave my wife the good ol' Kentucky thumb after your "incident"
Scott: That's great man, I'm happy to hear that.
Scott: That's great man, I'm happy to hear that.
by Jaybran61 May 20, 2021

Taken from a faulty SLAPP round the "Kentucky thumb" is when the man is about to conclude the sexual act and he jams his thumb up her arse.
by Gerald4War May 20, 2021
