gus·sy (gŭs'ē) tr.v.
gus·sied, gus·sy·ing, gus·siesSlang To dress or decorate elaborately; adorn or embellish: gussied herself up in sequins and feathers.
[Perhaps from Australian slang gussie, an effeminate man, from Gussie, diminutive of the personal name Augustus.]
"to dress up or decorate in a showy way," 1952, Amer.Eng. slang, apparently from Gussy (1940), schoolyard slang name for an overly dressed person, perhaps related to gussie (1901) "effeminate man," and somehow connected to the nickname for Augusta and Augustus.