nutty

adjective, nut·ti·er, nut·ti·est.

1. abounding in or producing nuts.
2. nutlike, especially in flavor.
3. Slang.
   1. silly or ridiculous: a nutty suggestion.
   2. eccentric; queer.
   3. insane.
   4. very or excessively interested, excited, or the like: He’s nutty about Mexican food.
4. full of flavor or zest; lively; stimulating; meaty: He offered several rich, nutty ideas on the subject.

adjective -tier or -tiest

1. containing or abounding in nuts
2. resembling nuts, esp in taste
3. a slang word for insane
4. (foll by over or about) informal extremely fond (of) or enthusiastic (about)

adj.

early 15c., “nut-like,” from nut + -y (2). Meaning “crazy” is from 1898 (see nuts); earlier “amorous, in love (with),” 1821. Related: Nuttiness.