Very sleepy or fatigued, especially after long or continuous physical activity. I thought the kids would have been all 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.Climbing up those steps really got my poor old dog 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.
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