Vocabulary What does もぐもぐ mean? もぐもぐ means chewing steadily with a full mouth; also mumbling indistinctly. Quick factsReadingもぐもぐ もぐもぐもぐもぐTOPICSchewing steadily with a full mouth; also mumbling indistinctlyExample sentences赤(あか)ちゃんはおかゆを口(くち)に入(い)れて、もぐもぐと動(うご)かしている。The baby puts porridge in its mouth and chews it slowly.