noun, noun which may take the genitive case particle 'no'
wide mouth; big mouth
Derogatory term for a person with a wide mouth, or used metaphorically for someone who talks too much or loudly.
あの人は鰐口だから、秘密を話すとすぐ広まるよ。
That person has a big mouth, so if you tell them a secret it'll spread quickly.
noun
Literally 'alligator mouth'; used as a slang or colloquial term for an alligator, often in children's language or informal contexts.
動物園でワニ口を見たよ。
I saw an alligator at the zoo.
noun
temple gong
A flat, round metal gong hung at the entrance of a temple or shrine, struck to get the deity's attention. The shape resembles an alligator's open mouth.
お寺の入り口で鰐口を鳴らしてからお参りした。
I rang the temple gong at the entrance before praying.
Compound of 鰐 (wani, 'alligator') and 口 (kuchi, 'mouth'), literally 'alligator mouth'. The temple gong sense derives from its resemblance to an open alligator's mouth.