Is meat a collective noun?

No, the noun 'meat' is not a collective noun.

The noun 'meat' is an uncountable, common, concrete noun; a word for a thing.

A collective noun is a noun used to group people or things in a descriptive way.

There is no standard collective noun for the noun meat, however, a collective noun is an informal part of language.

Any noun that is suitable can function as a collective noun, for example, a display of meats, a selection of meats, a mixture of meats, etc.