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
"I'm going to give myself the Kentucky Thumb once AK Daddy finally finishes the AK-50"
"I'm going to give my wife the Kentucky Thumb this evening for our anniversary: