Green’s Dictionary of Slang

1. a vegetarian; also adj.

1989		P. Munro Sl. U.
1997		K. Kainulainen ‘University Euphemisms in Calif. Today’ 🌐 ‘She’s a crunchy granola girl,’ tells us that the girl is natural-looking and has a healthy life-style and diet.

2. a devotee of New Age philosophies; also adj.

1986

Eble Campus Sl. Mar. 3: crunchy-granola – down to earth: He’s crunchy-granola with his long hair and Birkenstocks.

3. (also earthy-crunchy, hairy crunchy) someone who identifies with the styles and concerns of the 1960s.

1987		Eble Campus Sl. Spring 3: earthy-crunchy – person who dresses like, looks like, and eats like young people of the sixties.
1990		Eble Campus Sl. Oct. 3: granola [...] Also hairy crunchy.
1996		Eble Sl. and Sociability 44: Granola triggers an association with other kinds of health foods, which in turn inspire alternate forms for indicating ‘someone who identifies with the styles and concerns of the 1960s’: granola-groid, crunchy granola, crunchy, grape nut, nut-n-berry, rice-and-beaner, earth biscuit, and earth muffin.
2012		NY Rev. Books 21 June 🌐 California, which has the most public school students, tends to come at things from the opposite side, pressing for more reflection of a crunchy granola worldview.
2012		K. Shea ‘Pride’ in C. Rhatigan and N. Bird (eds) Pulp Ink 2 [ebook] It’s that stuff earth-crunchy yo-yos used to make [...] — Bio fuel?
2020		D. Winslow ‘Paradise’ in Broken 232: [A]anything, green alternative, off the grid, crunchy granola—that’s for Ben.