Definition of scupper:
loaf, throw/pour cold water on something, cross, foil, scuttle, uncover, ambush, lurk, bushwhack, disclose, menace, thwart, demoralize, shipwreck, imperil, footle, still-hunt, mill about, let out, founder, scotch, threaten, endanger, linger, discourage, disillusion, reveal, salvage, disappoint, lollygag, tarry, loiter, hang around, discover, baffle, wreck, expose, waylay, let on, bring out, frustrate, spoil, break, wear down, give away, cast a shadow over something, display, exhibit, lounge, dash someone's hopes, peril, lallygag, skulk, lie in wait, raise, bilk, ambuscade, shipwrecked, get down, keel over, jeopardise, unwrap, mill around, mess about, jeopardize, let down, queer, debunk, divulge.
- "The Boy Scout and Other Stories for Boys", Richard Harding Davis.
- "Jack Tier or The Florida Reef", James Fenimore Cooper.
One must really have seen an old ship sink in harbour to know how the rats look, black and grey, fat and thin, old and young, their tiny beads of eyes glittering with fright as they scurry up the hatches and make for every deck port and scupper, scrambling and tumbling over each other till they flop into the water and swim away, racing for safety, each making a long forked wake on the smooth surface, with a steady quick ripple like the tearing of thin paper into strips.- "The Heart of Rome", Francis Marion Crawford.