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Webster 1913 Edition
spanking
spank′ing
,Adj.
1.
Moving with a quick, lively pace, or capable of so doing; dashing.
Four
spanking
grays ready harnessed. G. Colman, the Younger.
2.
Large; considerable.
[Colloq.]
Webster 1828 Edition
Spanking
SPANK'ING
, ppr.1.
Striking with the open hand 2.
a. Large; stout. [Vulgar.]