noun, noun or participle which takes 'suru'
instant win; defeat in seconds; one-shot kill
Colloquial term used in gaming, sports, and competitions for winning or defeating an opponent extremely quickly, often in a matter of seconds. Can be used as a noun or with する.
See also: 瞬殺
あの格闘ゲームで、彼は相手を秒殺した。
In that fighting game, he defeated his opponent in seconds.
The instant win was decided just 10 seconds into the match.