[ guhs-ee ]
/ ˈgʌs i /

verb (used with object), gus·sied, gus·sy·ing.

to enhance the attractiveness of in a gimmicky, showy manner (usually followed by up): a room gussied up with mirrors and lights.

verb (used without object), gus·sied, gus·sy·ing.

to dress in one's best clothes (usually followed by up): to gussy up for the ball.

Origin of gussy

First recorded in 1935–40; of obscure origin Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for gussy up

gussy up
/ (ˈɡʌsɪ) /

verb -sies, -sying or -sied (tr, adverb)

slang, mainly US to give (a person or thing) a smarter or more interesting appearance

Word Origin for gussy up

C20: probably from the name Gussie, diminutive of Augusta
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012