Definition:
A "muncher" is a noun that refers to someone (or sometimes something) that chews food in a way that makes a noise, often described as "munching." This sound is produced when someone eats something crunchy or hard.
In more advanced contexts, "muncher" can also be used to describe a person who eats a lot or enjoys eating, especially in a casual or relaxed setting.
While "muncher" primarily refers to someone who makes noise while eating, it can also be used in a playful way to describe someone who enjoys food a lot, even if they aren't making noise.
There aren't specific idioms or phrasal verbs that use "muncher," but you might come across phrases like "munch on" which means to eat something casually.
In summary, a "muncher" is someone who chews food loudly, often enjoying their meal in a fun and casual way.