Exclamation used after one commits the act of unintentionally spilling beer, or accidentally knocking over any object for that matter.
Partier 1: Yo, watch out for that extension cord, you don't want to trip and party foul
those drinks sitting there.
Partier 2: What? (trips, knocks them over)
Partier 1: Schroooederrr! why'd you spill the beer asshole
Mover Man 1: Careful with that vase Bob!
Mover Man 2: Woops! (crash)
Mover man 1: Schroooederrr! You're fired!