overdresses
o-ver-dres-ses
verb
To wear clothes that are too formal or elaborate for a particular occasion.
"He always overdresses for a casual pub lunch."
Thesaurus
Synonyms: fancy up, deck out, deck up, dress up, fig up, gussy up, get up, rig out, prink, attire, tog up, tog out
Antonyms: dress down, underdress