Squid

wiktionary

Unknown. Perhaps a sailors' alteration of squirt.

Possibly a blend of stupid and quick; "stupid, quick, under-dressed and imminently dead", a claimed origin, is probably a backronym.

squid (n.)

marine mollusk, cuttlefish, 1610s, of unknown origin; perhaps a sailors' variant of squirt, so called for the "ink" it squirts out.