| 1. | to cause to become out of breath or fatigued; exhaust: Climbing that mountain pooped the whole group. |
| 2. | poop out,
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poop
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poop out
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poop out
Tire out, exhaust, as in I ran about ten miles, but then I was too pooped out to go on.
Quit, decide not to participate, especially at the last minute. For example, We had about twenty signed up for the seminar, but then half of them pooped out. [Slang; late 1800s]