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.

Insane, mad.

Example: After living on the island alone for five years, he eventually went nuts.

Crazy, mad; unusually pleased or, alternatively, angered.

Example: I just go nuts over her fantastic desserts.

Very fond of (on) someone.

Example: He's been nuts on her since the day they met.

Indicates annoyance, anger, or disappointment.

Example: Nuts! They didn't even listen to what I had to say.

Signifies rejection of a proposal or idea, as in forget it, no way, or nothing doing; often followed by to.

Example: They want me to pay $5 for a banana? Nuts to that!