The Finish Her prompt comes from Mortal Kombat, where the announcer tells the winning player to perform a fatality once the opponent is defeated. The male version, Finish Him, dates back to the series early arcade games, while Finish Her is the version used when the losing character is female. Mortal Kombat 1 keeps that ritual, with the same commanding delivery before the final blow. The line has since become shorthand online for ending an argument, a match, or a joke decisively.