Definition

1. Adjective:

   • Recklessly impulsive or rash: Characterized by a lack of careful thought, acting with sudden, energetic, and often foolish haste.
   • Eccentrically lively or zany: Behaving in a wildly unconventional and exuberant manner.

2. Noun:

   • A reckless, impulsive person: An individual who acts with sudden, careless enthusiasm, often ignoring danger or consequences.

Usage and Examples

• Adjective:

  • The madcap scheme to cross the ocean in a bathtub was doomed from the start.
  • Her madcap sense of humor always kept the party lively.

• Noun:

  • He was known as a madcap, always diving into new adventures without a second thought.
  • The old film starred a lovable madcap who caused chaos wherever he went.

Advanced Usage

• Used attributively to describe plans, adventures, or behavior that are wildly impulsive and unconventional.
  • The company was known for its madcap advertising stunts that captured public attention.

Variants and Related Words

• Madcap can function as both an adjective and a noun without changing form.
• Madcappery (noun, rare): Recklessly impulsive behavior or acts.
  • The evening was full of hilarious madcappery.

Synonyms

• Adjective: Reckless, impulsive, rash, foolhardy, harebrained, zany, wild.
• Noun: Daredevil, hothead, lunatic (informal), eccentric.

Antonyms

• Adjective: Cautious, prudent, sensible, deliberate, thoughtful.
• Noun: Conservative, stick-in-the-mud, cautious person.

Idioms and Phrases

• While "madcap" itself is not typically part of a larger idiom, it is synonymous with the spirit of phrases like:
  • To throw caution to the wind: To act recklessly.

    • They threw caution to the wind with a madcap road trip across the country.

Adjective

1. characterized by undue haste and lack of thought or deliberation; (`brainish' is archaic)
   • a hotheaded decision
   • liable to such impulsive acts as hugging strangers
   • an impetuous display of spending and gambling
   • madcap escapades

Noun

1. a reckless impetuous irresponsible person