1. Put on special clothes to appear particularly appealing and attractive
   "He gussied up for his first date in years";
   - dress up, fig out [informal], fig up [informal], fancy up [informal], trick up, trick out, attire, get up, rig out, tog up [informal], tog out [informal], doll up [informal]
    
2. Decorate or dress elaborately; make more attractive or impressive
   "They gussy upd the Christmas tree with lights and ornaments";
   - deck out, trick out, trick up

Derived forms: gussied up, gussies up, gussying up

Type of: dress, get dressed