A fork of Rural Dictionary
When an opponent on checkers can't move his or her last piece, similar to checkmate for chess.
I yelled "checkermate" when she was trapped and she laughed and called me silly as she lost.
When you're playing online checkers with Vic and she is forced to crown you.
Erik: "Here I come" Vic: "Oh no, you're heading towards my kings row" Erik: "Boom, checkermate"