Verb: The act of plugging a bleeding hole with your thumb in order to save your life.
Verb: The act of fingering a woman with your thumb
"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:
When you're bleeding to death and stop the bloodflow by plugging it with your thumb.
Also slang for fingering a woman.
"If AK daddy Doesn't make the AK-50 soon, I'm going to forcefully give him the Kentucky Thumb"