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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.
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.
To improve the appearance or style of someone or something; doll someone or something up: We prettied up the guest room with some new curtains. My parents prettied me up in a satin dress for the piano recital.