Trick out is a slang term that means to decorate or customize something, usually a vehicle. The crossword solutions for this term are ADORN (5 letters) and PIMP (4 letters). ADORN means to enhance something with attractive or elaborate decorations, while PIMP means to customize something in an ostentatious or flashy manner. Therefore, trick out can be interpreted as decorating or customizing something in an attractive or flashy way.