The Collaborative International Dictionary
Gallopin
Gallopin \Gal"lo*pin\, n.[F. galopin. See Gallop, v. i.]
An under servant for the kitchen; a scullion; a cook's errand
boy. [Obs.]
--Halliwell.
Wiktionary
gallopin
n. (context obsolete English) An underservant in the kitchen; a scullion, or cook's errand boy.