u/9VoltGorilla

According to my German friend, this word in German would mean (hummingbird) elevation butt steering in German.

German allows speakers to stick multiple nouns together into one long word. This fake word breaks down into four parts:

Gesäß: Buttocks or rear end.
Höhenruder: Elevator (the horizontal flap on an airplane’s tail that controls up-and-down movement).
Steuerung: Control or steering system.
Funktion: Function or operation.

Translated literally, it means “the function of using the butt as an elevator control surface.”

And when you watch hummingbirds flying in slow motion, you get a real respect for how much work that little tail is doing!

Minimally edited and only the action.