The act of, rather than sticking your thumb in her ass while you're fucking her, you pull out, shove it in her ass, and plug her vagina with your thumb
"Brandon, you wouldn't believe it, last night I gave Megan the Kentucky thumb and she liked it"
Noun: A sex act. One partner uses their non dominant thumb by inserting their thumb into the anus of the other partner while giving oral sex.
The dominant partner performs a Kentucky Thumb applies pressure to the anal interior with the thumb and places the remaining 4 fingers one of the posterior cheeks, gripping it like a Basketball. All while preforming oral sex on the recipient. This position can be done in either the 69 position or in the standing position.
When a person bends over, gets their ass slapped then a thumb up the butt while receiving a hickey on the neck.
I'm gonna give Hailey the Kentucky Thumb after prom.
A sexual position where the thumb of either hand is used by a female to check her the pulse of her (usually male) partner, by inserting it in the anal cavity. Then proceeding to thrust it back and forth to match the heartbeat
She gave me that Kentucky thumb.
When you plug a hole with your thumb. Any hole.
A: Ah, dammit I got shot!
B: quick put a Kentucky thumb in it!
A: so I took her home last night and got her a Kentucky thumb ;)
A sex position where a stud from Kentucky uses his thumb in order to plug a hole.
You're getting the thumb tonight...the Kentucky thumb.
When you have an accident and almost die when shooting your .50bmg and have a hole in your neck, or when you use said thumb for unholy purposes
Scott got the Kentucky thumb both ways