Definition of "dress up" [dress up]

• To wear fancy dress. (verb)
• To wear a costume. (verb)
• To decorate; to prettify. (verb)
• To present in a favorable light. (verb)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "We made sure the boat was stocked with plenty of toys for all levels, from show-offs (a wake board) to spazzes (that blow-up thing anyone can hang on to), and brought our own cushions to dress up the speedboat a touch, and waterproof cameras to capture the spills and thrills."
• "To dress up the popcorn-mix up a punch bowl of Oscar ambrosia-butter-laced popcorn tossed with chocolates and dusted with edible gold leaf."
• "I wear sexy lingerie and dress up in costumesmaid, nurse, you name it."