The story
From onychophagy + -ist = onycho- + -phag(y) + -ist, from Ancient Greek ὀνυχο- (onuch), combining form of ὄνυξ (ónux, “claw, nail”) + -φαγος (-phagos, “eater”), from ἐφαγόν (ephagón, “I ate”).
Etymology from Wiktionary, CC BY-SA 4.0.
onychophagist
Today it means: A person who bites his or her fingernails. Full definition →