Definition

Noun: 1. A crazy or insane person; someone who is mentally deranged and possibly dangerous. This is an informal, often derogatory term for a person whose behavior is extremely irrational, eccentric, or unstable.

Usage

• This word is highly informal and can be considered offensive. It is typically used in casual, often humorous or exasperated speech, not in formal or clinical contexts.
• It functions as a countable noun.

Examples

• "The man shouting at the traffic light is a complete nutcase."
• "Don't listen to him; he's a nutcase with some wild conspiracy theories."
• "She felt like a nutcase for talking to her plants, but it made her happy."

Advanced Usage

• The term can be used hyperbolically or affectionately among friends to describe someone acting in a very silly or irrational way, though this depends heavily on context and tone.
  • "You ate the whole pizza by yourself? You're such a nutcase!"

Variants and Related Words

• Nuts (adj., informal): Crazy or insane.
  • "That idea is completely nuts."
• Nutty (adj., informal): Eccentric or crazy.
  • "He has a few nutty ideas about time travel."
• Nutjob (noun, informal, derogatory): A synonym with very similar meaning and usage.

Synonyms

• Lunatic (informal/dated)
• Maniac (informal)
• Psycho (slang, highly derogatory)
• Crackpot (informal, often for someone with strange ideas)

Idioms and Phrases

• Drive someone nuts: To irritate or annoy someone greatly.
  • "The constant noise is driving me nuts."
• Off one's nut (slang): To be insane or acting very irrationally.
  • "He must be off his nut to try that stunt."

Noun

1. someone deranged and possibly dangerous