- to enhance the attractiveness of in a gimmicky, showy manner (usually followed by up): a room gussied up with mirrors and lights.
- to dress in one's best clothes (usually followed by up): to gussy up for the ball.
Origin of gussy
- slang, mainly US to give (a person or thing) a smarter or more interesting appearance
Word Origin and History for gussy up
"to dress up or decorate in a showy way," 1952, American English 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.