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off one's nut

off one's nut

9.9
Acting in a very strange and not sensible way
  • idiom
  • Offensive
translation icon : loco
  • Schulz, you're off your nut.

Examples

Synonyms

crazy
vsoff one's nut
  • Offensive
4.1

Mentally ill and unable to think or behave in a normal way

is more informal and focuses on odd behaviour rather than illness
deranged
vsoff one's nut
  • Offensive
77 7.6

Not able to think or act in a normal, reasonable way

is more colloquial and covers unstable but not severe illness
nutty
vsoff one's nut
  • Informal
55 7.2

Being a little crazy in a funny or strange way

is more negative and emphasises irrational or unstable behaviour
unhinged
vsoff one's nut
  • Offensive
27 7.8

A person who is not thinking or acting in a normal and safe way

is less clinical and used more in informal descriptions
screw-loose
vsoff one's nut
  • Offensive
12 9.0

Behaving in a strange or not sensible way

implies broader irrationality rather than a single odd trait
raving mad
vsoff one's nut
  • Informal
7 7.2

Acting or speaking in a wild, not sensible way

covers irrational behaviour too but can be less extreme
crazed
vsoff one's nut
1 5.0

Acting in a wild and uncontrolled way

can include craziness but also milder odd behaviour
nutty as a fruitcake
vsoff one's nut
  • Informal
1 9.0

Very strange and silly in a way that seems crazy

is similar but usually less exaggerated and more literal
half-crazed
vsoff one's nut
1 7.8

Very frightened or upset and not thinking clearly

typically refers to everyday irrational actions rather than extreme madness
off one's trolley
vsoff one's nut
  • Offensive
1 9.9

Acting in a strange, confused way and not thinking clearly

focuses more on wild or uncontrolled behaviour rather than mere oddness
insane in the membrane
vsoff one's nut
  • Slang
1 9.8

Acting or feeling very silly and not thinking clearly, often as a joke

is used more seriously for genuinely irrational behaviour
nuts
vsoff one's nut
  • Offensive
8.6

Very crazy or doing things that show bad judgment

is similar but more idiomatic and slightly less blunt
bonkers
vsoff one's nut
  • Informal
8.0

Acting or feeling very strange

is similar but carries a slightly stronger sense of instability
off one's tree
vsoff one's nut
  • Offensive
9.9

To behave in a very strange and unreasonable way

is more commonly used to stress clear mental instability
off one's box
vsoff one's nut
  • Archaic
9.9

Feeling confused and out of control after drinking or when very upset

is broader, covering general irrational behaviour without a cause
off one's dot
vsoff one's nut
  • Archaic
9.9

Acting strange or a little crazy

stresses stronger irrationality and clearer mental instability
cracked
vsoff one's nut
  • Offensive
7.4

Someone who acts a little crazy

is stronger and implies clearer irrational or unstable behaviour
meshugana
vsoff one's nut
  • Offensive
9.9

Very silly or clearly crazy

is similar but usually used more seriously and less playfully

Antonyms

735 1.0

Not showing strong feelings and being very still

119 3.2

Having a healthy mind and able to think clearly

How Crazy

insane
  • Slur
524 4.0
crazy
  • Slur
40 7.2
off one's nut
  • Offensive
9.9
odd
798 1.0
eccentric
1 7.0

Surface Forms

off one's nut positive

Morphology

off + one + nut

There is a partial compositional clue: 'off' can signal something being not right and 'nut' is slang for an eccentric/crazy person or (metaphorically) the head, so a learner who knows these slang senses might infer 'mentally unstable'. However, the slang sense of 'nut' and the idiomatic possessive pattern 'off one's X' are informal and not reliably known at B1, so the meaning is not fully predictable without exposure.

Etymology

The idiom off one's nut comes from nut meaning a person's 'head' and from the simple picture of a small metal nut that holds parts together; when the nut is off, the parts are loose and do not work right. That's why someone 'off their nut' is said to be acting 'crazy' or not thinking clearly.