early 14c., related to M.Du. spoiten
"to spout," N.Fris. spütji
"spout, squirt," Swed. sputa
"to spout," and probably M.Du. spuwen
"to spit" (see spew
). Meaning "to talk, declaim" is recorded from 1610s. The noun is first recorded late 14c. It was the slang term for the lift in a pawnbroker's shop, up which articles were taken for storage, hence fig. phrase up the spout
"lost, hopeless, gone beyond recall" (1812).