A fight or brawl; or, a challenge or incitement to fight. (noun)
A weapon planted at a crime scene in order to mislead investigation. (noun)
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Use "throw-down" in a sentence
"Definitely pulled a muscle in our sexual throw-down."
"Turned out to be something akin to a literary throw-down at St Mark's Church's "Poetry Project.""
"When you haven't been sleeping with the same person for years and aren't subject to the sexual monotony that often accompanies monogamy, aren't you supposed to be going for the hair-pulling, multi-orgasmic, passionate throw-down every time?"