sexy up

verb2

1. •
   (slang) To make more sexually attractive.

   • She'd come to a party all sexied up and really move it around and drink wine and flirt until midnight came and then she'd lay her scene on whomever was trying to get into her pants[…] — 1995
2. •
   (slang) To otherwise enhance the appearance or appeal of.

   • Back at the remedial Lab, Pacey our neglectful god has skipped this lesson and he decides to scoop up a pretty-looking snail and toss it in the tank to sexy up the atmosphere. — 1999