poop [1] (puep) n., v. <pooped, poop-ing>
n.
1. a superstructure at the stern of a vessel.
2. POOP DECK.
v.t.
3. (of a wave) to break over the stern of (a
ship).
4. to take (seas) over the stern.
[1375-1425; late ME pouppe < MF < L puppis stern
of a ship]

poop [2] (puep) v.t. <pooped, poop-ing> Informal
1. to cause to become out of breath or
exhausted: pooped after the long hike.
2. <poop out>.
a. to become exhausted.
b. to give up or cease to participate.
c. to break down; stop functioning.
[1885-90; perh. to be identified with POOP 4]

poop [3] (puep) n. Slang
1. a candid or pertinent factual report;
low-down.
[1945-50, Amer.; appar. extracted from poop sheet
fact sheet; cf. POOP 4]

poop [4] (puep) n., v. <pooped, poop-ing> Slang
n.
1. feces; excrement.
v.i.
2. to defecate.
[1735-45; earlier " to break wind, " prob. the
same word as ME powpen, popen to sound or blow a
horn; uncert. if POOP 2, POOP 3 are sense
developments or parallel expressive coinages]