from
The Collaborative International Dictionary of English v.0.48
Scupper \Scup"per\, n. [OF. escopir, escupir, to spit, perhaps
for escospir, L. ex + conspuere to spit upon; pref. con- +
spuere to spit. Cf. {Spit}, v.] (Naut.)
An opening cut through the waterway and bulwarks of a ship,
so that water falling on deck may flow overboard; -- called
also {scupper hole}.
[1913 Webster]
{Scupper hose} (Naut.), a pipe of leather, canvas, etc.,
attached to the mouth of the scuppers, on the outside of a
vessel, to prevent the water from entering. --Totten.
{Scupper nail} (Naut.), a nail with a very broad head, for
securing the edge of the hose to the scupper.
{Scupper plug} (Naut.), a plug to stop a scupper. --Totten.
[1913 Webster]