The Collaborative International Dictionary
Sherryvallies
Sherryvallies \Sher"ry*val`lies\, n. pl. [Cf. Sp. zaraquelles
wide breeches or overalls.]
Trousers or overalls of thick cloth or leather, buttoned on
the outside of each leg, and generally worn to protect other
trousers when riding on horseback. [Local, U.S.]
--Bartlett.
Wiktionary
sherryvallies
n. (context historical English) Thick loose riding-trousers, fastened on the outside of each leg.