The hybridization of German words forming a fictional term designed to designate badassery.
Sterbenlicht is a badass (A person whose extreme attitudes and behavior are admirable).
"The epitome of the American male. He radiates confidence in everything he does, whether it's ordering a drink, buying a set of wheels, or dealing with women. He's slow to anger, brutally efficient when fighting back." - UD (Badass)