throwdown

noun

1. (slang)A fall, indicating defeat.
2. (rare, slang)A weapon planted at a crime scene in order to mislead investigation, especially in situations where deadly force would only have been justified if the victim were armed. Also an untraceable weapon kept in readiness for such use.

   “The inquiry also found evidence some Australian troops in Afghanistan carried "throwdowns" — such as weapons, radios and grenades not issued by the ADF — which would be planted next to the bodies of Afghan civilians to suggest they were a "legitimate target" in any post-incident investigations.”

3. (slang)A slam dunk.
4. (slang)A fight or brawl; or, a challenge or incitement to fight.
5. (slang)A performance by a rapper or DJ that is intended to be particularly hardcore or intense.

   “a hip-hop throwdown”

6. (slang)A type of hardcore dance in which a person violently clears a space for himself and appears to be ready to fight those around him, while making violent and erratic movements with his body.
7. (Australia, informal)A 250 ml bottle of beer.
8. (Australia)A type of small firework that explodes with a loud noise when thrown violently onto the ground.