Dictionary

A hard-shelled seed.

Example: There are many sort of nuts: peanuts, cashews, pistachios, Brazil nuts and more.

A piece of metal, usually square or hexagonal in shape, with a hole through it having machined internal threads, intended to be screwed onto a bolt or other threaded shaft.

A crazy person.

Example: He was driving his car like a nut.

The head.

(mostly in the form "nutting") To gather nuts.

To hit deliberately with the head; to headbutt.

(mildly) To orgasm; to ejaculate.

No.