1. To become sleepy or fatigued, especially after long, continuous physical activity. Hopefully the kids will tucker out if we let them run around outside for long enough. I started tuckering out only halfway through the hike.
2. To cause someone or an animal to become sleepy or fatigued, especially after long or continuous physical activity. In this usage, a noun or pronoun can be used between "tucker" and "out." I thought swimming at the beach all day would have tuckered him out, but he still seems to have loads of energy. Climbing up all those steps really tuckered out my poor old dog.
Fatigued or sleepy, especially after long or continuous physical activity. I thought the kids would have been tuckered out after spending all day at the pool, but they're still full of energy. I'm pretty tuckered out after that hike, to be honest.
*(all) tuckered out
Rur. tired out; worn out. (*Typically: be ~; get ~.) Poor John worked so hard that he's all tuckered out. Look at that little baby sleeping. She's really tuckered out.
Exhausted, very tired, as in I was all tuckered out after that game. The precise origin of this usage is not known. [Colloquial; 1820s]