The act of sticking your thumb into a smaller hole to fill it. Named after the youtube creator Kentucky Ballistics in honor of his thumb that saved his life.
The act of violently sticking your thumb into someone's bleeding anus.
"Brandon Herrera told everyone on YouTube that he loves the Kentucky Thumb. "
"After we used the dildo mounted a reciprocating saw last night, I had to give her the Kentucky Thumb"
"Just put a thumb in it... a Kentucky Thumb in it."
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