1. (n.) That which finishes or ends a matter; a settler; a poser, as a heavy blow, a conclusive answer, and the like.

2. (n.) A combination of two hooks which close upon each other, by means of a spring, as soon as the fish bites.

KO clincher conclusive argument crusher death stroke deathblow end-all ender final stroke finisher finishing stroke floorer kayo kayo punch knockdown argument knockout knockout blow last dab quietus settler stopper