|1.||a raised structure at the stern of a vessel, esp a sailing ship|
|2.||See poop deck|
|3.||(tr) (of a wave or sea) to break over the stern of (a vessel)|
|4.||(intr) (of a vessel) to ship a wave or sea over the stern, esp repeatedly|
|[C15: from Old French pupe, from Latin puppis poop, ship's stern]|
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]