from
The Collaborative International Dictionary of English v.0.48
Sockdolager \Sock*dol"a*ger\, n. [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.]
[1913 Webster]
2. (Angling) A combination of two hooks which close upon each
other, by means of a spring, as soon as the fish bites.
[U. S.]
[1913 Webster]
3. Something unusually large. [Slang, U. S.]
[Webster 1913 Suppl.]