As a noun, a tucker is either someone who sews tiny pleats in fabric or an old-fashioned fabric insert in the neck of a dress. As an informal verb, tucker means "exhaust or tire."
If you're a tucker, you're a sewer or a stitcher. And if you wear an antique dress, it may have a tucker made of lace or linen that's sewn into its neckline. These days, you're more likely to hear tucker used as a verb. A long day at the zoo may tucker out your four-year-old cousin. Experts believe that this New England slang might stem from tucker, an informal verb used to mean "exhaust a dog."