tuck in

verb
  1. 1

    To pull the blankets or duvet up over (someone in bed); to put (someone) to bed.

    โ€œShe tucked in her young son and turned out the light.โ€

  2. 2

    To push (the fabric at the bottom of a shirt) under the pants.

  3. 3

    To acquire something tiny

  4. 4

    To score from with a casual motion

verb
  1. 1

    To start to eat.

    โ€œTuck in, before the food goes cold.โ€

Source: https://en.wiktionary.org/wiki/tuck%20in