Checkmate

What you say when you bring in an argument so powerful that your debate opponent is unable to respond to it.

Checkmate is a chess term used when the opponent cannot move their king out of check. Checkmate doesnt just mean that you've simply cornered the enemy king its a declaration that the enemy king is yours.

What you say when someone has been burnt/roasted. When there's just no coming back, and they have nothing to say in reply. There are no moves remaining.

To turn up to a friend's house uninvited. Since you have travelled all the way there, they feel obliged to invite you in.

Checkmate is use to solidify your opinion and/or argument.

Checkmate is a position in Chess, in which a player's king is in a line of attack by an opponent's piece and cannot escape check. Thus, the attacking player wins the game.

Did you know that the quickest possible checkmate in Chess requires four moves only?

To sit next to someone in a bathroom stall and then have a really stinky crap. As with chess, this puts them in a position where they are under direct attack, that cannot be avoided.