Quick definitions from WordNet (tuck)

▸ noun:  a narrow flattened pleat or fold that is stitched in place
▸ noun:  (sports) a bodily position adopted in some sports (such as diving or skiing) in which the knees are bent and the thighs are drawn close to the chest
▸ noun:  eatables (especially sweets)
▸ noun:  a straight sword with a narrow blade and two edges
▸ verb:  fit snugly into ("Tuck your shirtail in")
▸ verb:  make a tuck or several folds in ("Tuck the fabric")
▸ verb:  draw fabric together and sew it tightly
▸ name:  A surname (rare: 1 in 25000 families; popularity rank in the U.S.: #3239)

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▸ Also see tuck