fill out

/fษชl aสŠt/
verb
  1. 1

    To complete a form or questionnaire with requested information.

    โ€œPlease fill out this application if you are interested in the job.โ€

  2. 2

    To have one's physique expand with maturity or with surplus weight.

    โ€œHe began to fill out once he started college.โ€

  3. 3

    To fill up; to make full.

Source: https://en.wiktionary.org/wiki/fill%20out