To be pooped means to be completely exhausted or worn out. After running around at recess all afternoon, you might flop onto the couch at home and tell your mom you're pooped. When your dad finishes mowing the lawn on a hot day, he might say he's pooped and needs to rest.

The word is informal and a bit playful, the kind you'd use with family and friends rather than in a school report. You might say “I'm pooped” after a long soccer practice, a day of hiking, or even after concentrating hard on a difficult project. It captures that specific feeling of tiredness that comes from physical activity or mental effort, when your body or brain is telling you it needs a break.

Pooped is different from just feeling a little tired. When you're pooped, you're really ready to sit down, catch your breath, and recharge. The word suggests you've actually done something that used up your energy, which makes the tiredness feel deserved rather than like you were just avoiding work.