tuck in

:  to push in the loose end of so as to hold tightly

:  to cover by tucking in bedclothes

:  to put into a snug often concealing or isolating place

:  a fold stitched into cloth to shorten, decorate, or control fullness

:  a cosmetic surgical operation for the removal of excess skin or fat from a body part

:  a body position (as in diving) in which the knees are bent, the thighs drawn tightly to the chest, and the hands clasped around the shins

:  a sound of or as if of a drumbeat

:  vigor, energy

:  rapier