SOCKDOLAGER
Etymology
Noun
sockdolager (plural sockdolagers)
(US, slang, dated) a hard hit, a knockout or finishing blow, or conclusive argument.
(US, slang, dated) Something large or otherwise exceptional; a whopper.
(US, angling) A combination of two hooks which close upon each other, by means of a spring, as soon as the fish bites.
Source: Wiktionary
Sock*dol"a*ger, n. Etym: [A corruption of doxology.] [Written also
sockdologer.]
1. That which finishes or ends a matter; a settler; a poser, as a
heavy blow, a conclusive answer, and the like. [Slang, U.S.]
2. (Angling)
Definition: A combination of two hooks which close upon each other, by
means of a spring, as soon as the fish bites. [U. S.]
Source: Webster’s Unabridged Dictionary 1913 Edition