* Loud chewing: In which case, you might say someone is munching, chomping, crunching, guzzling, gobbleing, or gnawing loudly.
* Unpleasant chewing sounds: You could describe it as smacking, slurping, sucking, or chewing with your mouth open.
* Chewing with exaggerated motions: You might say someone is chewing with gusto, chomping with relish, or munching with enthusiasm.
To give you a better answer, tell me what kind of noisy chewing you're trying to describe! 😊