What does nutter mean?
A nutter is an informal word for a person regarded as crazy, irrational, or eccentric. In British English, it is often insulting, but it can also be used humorously or affectionately when describing someone with unusual behavior or intense enthusiasm. The second sense is especially familiar in expressions such as 'a football nutter', meaning an obsessive fan. The word is noticeably more common in British English than in standard American English, where 'nut' or 'nutcase' may be preferred. Because it can sound derogatory, careful speakers usually reserve it for informal situations and consider the context and relationship between the people involved.
nounAn informal term for a person regarded as crazy, eccentric, or behaving irrationally. It can be used as an insult or, depending on context, affectionately to describe someone who is wildly enthusiastic or unconventional.
- A person regarded as crazy, irrational, or eccentric, especially in a dismissive or insulting sense.
- An enthusiastic devotee of an activity or interest, especially in British informal English.
"The whole family are mental nutters, but they are always fun at parties."
"He raced across the platform shouting warnings, and everyone thought he was a complete nutter."
"My dad is a cycling nutter and spends every weekend watching races."
Used in the plural to refer to multiple people regarded as crazy, eccentric, or obsessively enthusiastic.
"The group chat is full of racing nutters."
In British English, 'nutter' can mean either someone out of their mind or someone enthusiastically devoted to a hobby: a football nutter or a photography nutter.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of nutter
The word is formed from 'nut' with the suffix '-er'. In its older informal sense of a crazy or eccentric person, it developed from the idea of someone whose ideas or behavior are 'off one's nut'. The expression 'off one's nut' meaning insane or eccentric is attested in earlier informal English. Later, especially in British English, 'nutter' also came to denote an obsessive enthusiast, as in 'a music nutter'.
How nutter is actually used
Informal and potentially insulting. It is especially common in British English and may sound more playful when used about someone who is eccentric or intensely enthusiastic.
Easily confused with nutter
As a standalone word, nutter is an informal British term for a crazy or eccentric person; in the expression 'the nutter', it can also mean someone intensely enthusiastic about a particular activity.
A nut can mean a person regarded as crazy, while nutter more directly refers to such a person and is especially associated with British informal English.