the.com/smackdown

A beatdown with branding — defeat so decisive it needed a trademark.

means A decisive, often public defeat or crushing rebuttal of an opponent.

from American wrestling slang from the 1980s–90s, built straight from 'smack' (a sharp hit) plus 'down' (getting knocked to the mat). WWE/WWF turned it into a proper noun — the show 'SmackDown!' launched in 1999 — and from there it jumped the ropes into politics, sports commentary, and everyday trash talk for any lopsided win.

origin
WWF show named it in 1999
etymology
smack plus down, literally hit descending
usage drift
now means any crushing verbal or political defeat
irony
wrestling is scripted, the word still implies real pain
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