Meaning

noun predatory black-and-white toothed whale with large dorsal fin; common in cold seas

noun slaty-grey blunt-nosed dolphin common in northern seas

originFrom Middle English *grampas, grappays, grapas, graspeys, from Anglo-Norman grampais, Old French graspois, craspois (“whale, (salted) whale meat; blubber; seal”), from Medieval Latin craspicis (literally “fat fish”), from Latin crassus (“fat”) + piscis (“fish”).

Etymology from Wiktionary, CC BY-SA 3.0