v. Slang 1. To dress someone in special or fancy clothes. Used chiefly in the passive or with a reflexive: We were gussied up in ball gowns. I gussied myself up for the party.
2. To add embellishing details to something in order to make it more attractive: The chef gussied up the meat loaf with a truffle sauce. The decorators gussied the room up for the ceremony.