The Collaborative International Dictionary
Underpight
Underpight \Un`der*pight"\, imp. of Underpitch.
Underpight
Underpitch \Un`der*pitch"\, v. t. [imp. Underpight.] [OE. underpicchen. See Under, and Pitch to throw, fix.] To fill underneath; to stuff. [Obs.]
He drank and well his girdle underpight.
--Chaucer.
Wiktionary
underpight
vb. (context obsolete English) (en-past of: underpitch)