Den Schlanken
"Den Schlanken" is german for "The Thin". When your friend is in a 1 versus X position in an FPS game, you usually say "Mach den Schlanken" or "Do the Thin" which means, "Take his Life" or "Fucking end him". Or in other words, fucking obliterate and kill him.
Person 1: Bro shit I have to kill 5 dudes on my own.
Person 2 (Spectator) : Fuck it mach den Schlanken bro.
Person 2 (Spectator) : Fuck it mach den Schlanken bro.