Dictionary.com:

meat n.

1. The edible flesh of animals, especially that of mammals as opposed to that of fish or poultry.

2. The edible part, as of a piece of fruit or a nut.

3. The essence, substance, or gist: the meat of the editorial.

4. Slang. Something that one enjoys or excels in; a forte: Tennis is his meat.

Nourishment; food: “Love is not all: it is not meat nor drink” (Edna St. Vincent Millay).