brown up

brown up (third-person singular simple present browns up, present participle browning up, simple past and past participle browned up)

1. (transitive, intransitive, literally) To become or make (something) brown in color, such as by cooking.
2. (transitive, intransitive) To become browner from tanning.
3. (transitive, intransitive) To put on or wear brownface makeup.