The Kentucky Plug is the act of sticking your left thumb in a woman’s anus while simultaneously holding her in position as tightly as you can to see how long you can make it before she’s able to get your thumb out of her anus.
When during sex with a menstruating woman, (or traumatic injury resulting in uncontrolled arterial hemorage) you jam your thumb in the hole to hold back the red sea.
"Man, Scott would be figgety fucked after the slap round if he hadn't deployed the ol' Kentucky Plug."
"Man, I got my red wings last night. It would've looked like a Kentucky Ballistics video if I hadn't pulled out The Kentucky Plug.
When your Serbu 50 cal explodes in your hands lacerating your jugular and a family member or significant other plugs the hole with their thumb saving your life.