sockdolager

A conclusive blow or remark.

Something outstanding.

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

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

Something unusually large.

a hard hit, a knockout or finishing blow

something exceptional

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