(nu-tter) n.

1. a crazy person
2. someone who is psychotic

Used in the U.K to describe f#@ked up people

The age at which one is finally considered human.

Used in British English to refer to someone who is insane.

Also probably the most common mistake made by outsiders when trying to reproduce a British accent. For the record, it's either "he's a nutter" or "he's nuts". Saying "he's nutters" is a good way to make British people dislike you.

Retro 70's men's short shorts that invariably expose a testicle or two at the most inopportune time. Made popular back in the 70's and 80's by Tom Selleck's character Magnum, PI

A mentally unwell person. One who is crazy/pyschotic. It's a brain condition which is inherited and makes one act in irrational and insane ways.

An absolute loose cunt who does the sickest and funniest shit and is always good to have around for a laugh. Everything a Nutter does is shaded with a tinge of crazy. Lacks awareness and is a lunatic, doesn't have it all quite there upstairs, but will act like a muppet, show off and be the nuttiest nutter.

s.o. who is obviously utterly bonkers.