Putting a tumb up in someone's ass as deep as you can like your trying to stop them from bleeding to death due to a bad 50 cal explosion and you have severed your jugular.
She said she likes anal so I gave her the old Kentucky Plug and still haven't got a call back.
Named after Kentucky Ballistics 50 BMG SLAP round accident where he plugs his open wound with his thumb. This sex move is done by slowly inserting your exposed thumb into a female's vagina.