When your game of Fortnite becomes a cluster fuck in Tilted towers, ending in you and your squad dying first which causes you and your squad to rage quit and consistently refer to the game as "Fucknite" instead of the actual name of the game.
Fucknite is a convenient yet very sexual way of saying the popular video game, "Fortnite". This term is used when that person is trying to be funny and can either be successful or not.
Example 1: Hey Nick, would you like to get on fucknite right now?
Example 2: You ever heard of that game, fucknite?
Example 3: Ew did you hear that Chris plays fucknite!?
The ability of one, without clue (being Clueless), to use emotion without logic or rational thought to argue their point. More often than not acted out by the Fuckwit