pretty oneself up
To make someone, something, or oneself appear more visually attractive or appealing. A noun or pronoun can be used between "pretty" and "up." My sisters wanted to pretty me up for my date, but I told them I was happy with how I looked. The real estate agent wants us to pretty the house up a bit before we put it on the market. She said she wanted to pretty herself up before going out, but she's been in there for nearly an hour.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
pretty oneself (or something) up
Rur. to make oneself or something more attractive; to tidy oneself or something up. I tried to pretty myself up for him, but he didn't notice. Let's try to pretty up this room.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.