When a knacker goes up to another knacker, and to act like hard ass hey will scream "SCHWAA", like any animal in the wildtrying to act scary, or fend off threats
1. the disgusting particulate matter, consisting of dirt, dust, and hair that accumulates in the water cup of a beirut/beer pong game, especially games held in a college dorm room, where schlaank is particularly common.
2. Anything that has the disgusting qualities of schlaank.
1. "Loser (of the game) eats the schlaank!" (highly unadvisable).
2. "Yo this meatloaf tastes like schlaank."