tuck in

Short definition from Wiktionary

Verb

1. 1
   To pull the blankets or duvet up over (someone in bed); to put (someone) to bed.
2. 2
   To pull the blankets or duvet up over oneself; to get in bed.
3. 3
   To push (the fabric at the bottom of a shirt) under the pants.
4. 4
   To acquire something tiny
5. 5
   To score from with a casual motion
6. 6
   To place in a small space.
7. 7
   To eat heartily.

Noun

1. 1
   A hearty meal.
2. 2
   The process of putting a child to bed and tucking the covers around them.