grow up

/G R OW1 AH1 P/
verb
  1. 1

    To mature and become an adult.

    โ€œWhat do you want to be when you grow up?โ€

  2. 2

    To start to develop; to flourish.

    โ€œSocialism grew up in the industrial cities.โ€

  3. 3

    To stop acting as or like a child (often used as an imperative interjection).

    โ€œWill you grow up please, and stop making silly faces?โ€

Source: https://en.wiktionary.org/wiki/grow%20up