MUNCH, verb transitive chew by great mouthfuls. [Vulgar.]
MUNCH, verb intransitive To chew eagerly by great mouthfuls. [Vulgar.]
Webster's Dictionary 1828
MUNCH, verb transitive chew by great mouthfuls. [Vulgar.]
MUNCH, verb intransitive To chew eagerly by great mouthfuls. [Vulgar.]