Definition of tucks:
(v) :
(transitive) To pull or gather up (an item of fabric).
(v) :
(transitive) To push into a snug position; to place somewhere safe, or handy, or somewhat hidden.
(v) :
(intransitive, often with "in" or "into") To eat; to consume.
(v) :
(ergative) To fit neatly.
(v) :
To curl into a ball; to fold up and hold one's legs.
(v) :
To sew folds; to make a tuck or tucks in.