guchu-guchu
The wet, squishy sound of chewing something moist or gargling mouthwash.
💡Gargling after brushing teeth — 'He gargled the mouthwash guchu-guchu.'
うがい薬をぐちゅぐちゅとゆすいだ。
I gargled the mouthwash guchu-guchu.
After the dentist, I ___ rinsed my mouth with water.
歯医者の後、水で○○とうがいをした。