The act of using your thumb to plug any orifice, while you SLAP the shit out of your partner. Inspired by a horrific shooting accident with ridiculously hot .50BMG Rounds.
Had to give 'em the Kentucky Plug, shove my thumb in 'er throat while I slapped her ass red.
A exciteing sexual move! When he/or she thrusts his/or her thumb into his/or her partners anus with the force of a 50 cal "Slap" round. 9/10 times this move will result in blindness for both partys.
"Jeffs wife had been walking into everything. She lost her site after he gave her the Kentucky plug last night"