Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Smackdown" Definition
noun
A fight; a beating, a physical or emotional confrontation.
Source: Wiktionary
The act of knocking down or bringing down an opponent.
Source: Merriam-Webster
A contest in entertainment wrestling.
Source: Merriam-Webster
A decisive defeat.
Source: Merriam-Webster
A confrontation between rivals or competitors.
Source: Merriam-Webster
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