madcap

mad·cap
M3A1D2C3A1P3
UK/ˈmædkæp/US/ˈmædˌkæp/South Asia/ˈmæɖˌkæp/

noun

A person who acts in a capricious, impulsive, or reckless manner.

“Near-synonyms: mad lad, madlad”

UncommonFirst used late 16th c.Scrabble 13

Meanings

nounmadcap (plural madcaps)

plural madcaps · alternative mad-cap · alternative mad cap

  1. A person who acts in a capricious, impulsive, or reckless manner.

    Near-synonyms: mad lad, madlad

    4 more examples

    Come-on you mad-cap: Ile to the Ale-houſe vvith you preſently; […]

    c. 1590–1591 (date written), William Shakespeare, “The Two Gentlemen of Verona”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act II, scene v], page 27, column 1

    There vvas then in preſence, a certaine old Knight, called Sir Hugh Linne, a good ſouldier, but a very mad-cap, & one that liued chiefely vpon the liberalitie of noble men; […]

    1599, I. Haywarde [i.e., John Hayward], The First Part of the Life and Raigne of King Henrie the IIII. […], London: […] by [Edward Allde and T. Judson for] Iohn Wolfe, […], →OCLC, page 19

    Lord, that ſuch a Mad-Cap as I ſhould ever live to be jealous!

    1667 March 12 (first performance; Gregorian calendar), John Dryden, Secret-Love, or The Maiden-Queen: […], London: […] Henry Herringman, […], published 1668, →OCLC, Act III, page 34

    I should like to have seen that noble old madcap Peterborough in his boots (he actually had the audacity to walk about Bath in boots!), with his blue ribbon and stars, and a cabbage under each arm, and a chicken in his hand, which he had been cheapening for his dinner.

    1861 November, W[illiam] M[akepeace] Thackeray, “George the First”, in The Four Georges: Sketches of Manners, Morals, Court, and Town Life, London: Smith, Elder and Co., […], →OCLC, pages 34–35

    Synonyms: mad lad, madlad

  2. South AsiaA very foolish or irresponsible person; a fool, an idiot.

    [R]un around as he commands. He is a madcap and we must learn to live with him. We are in his hands.

    1983, R[asipuram] K[rishnaswami] Narayan[aswami], A Tiger for Malgudi, New Delhi; Navrangpura, Ahmedabad: Allied Publishers [in arrangement with William Heinemann], →OCLC, page 50

    Synonyms: fathead, alcatote, asshat, arsehole, asshole, bayard, berk, birdbrain

  3. obsoleterareAn insane person; a lunatic.First known use late 16th c.

    VVhy vvhat a mad-cap hath heauen lent vs here?

    c. 1596 (date written), William Shakespeare, “The Life and Death of King Iohn”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act I, scene i], page 1, column 2
    1 more example

    Bel[lamont]. […] [W]hat place is this? / May[bery]. Bedlam iſt not? / Bel. VVhere theſe mad-men are, I neuer vvas amongſt them, as you loue me Gentlemen, lets ſee vvhat Greekes are vvithin. / […] / Bell. Pray beſtovv your name ſir vpon vs. / Full. My name is Full-moone. / Bell. You vvell deſerue this office good maiſter Full-moone: and vvhat mad-caps haue you in your houſe.

    c. 1601 (date written), Thomas Decker [i.e., Thomas Dekker]; Iohn Webster [i.e., John Webster], North-ward Hoe. […], London: […] G[eorge] Eld, published 1607, →OCLC, Act IV, signature F3, recto

    Synonyms: madhead, crazyhead, madman, basket case, basket weaver, crack, crackpot, crazy

adjectivemadcap (comparative more madcap, superlative most madcap)

comparative more madcap · superlative most madcap · alternative mad-cap · alternative mad cap

  1. Capricious, impulsive, or reckless; also, bizarre, crazy, zany; or foolish, idiotic.

    a madcap activity    a madcap idea    a madcap plan

    5 more examples

    The film featured a madcap car chase that went right through a crowded café.

    O lepidum caput, O mad cap maſter.

    c. 1588 (date written; published 1591), [John Lyly], Endimion, the Man in the Moone. […], London: […] I[ohn] Charlewood, for the widdowe Broome, →OCLC, Act V, scene ii, signature G, verso

    [H]is mad-cap follies, / VVhich ſtill like Hydras heads grovv thicker on him.

    1610–1616 (date written), Iohn [i.e., John] Fletcher, Monsieur Thomas. A Comedy. […], London: […] Thomas Harper, for Iohn Waterson, […], published 1639, →OCLC, Act I, scene iii, signature [C4], recto

    [T]hose fairy times when I was a mad-cap boy, crowding every enjoyment into the present moment; […]

    1808 January 25, [Washington Irving], “Monday, January 25, 1808. From My Elbow-chair.”, in Salmagundi: Or, The Whim-whams and Opinions of Launcelot Langstaff, Esq. and Others, number 20, London: J[ohn] Limbird, […], published 1824, →OCLC, page 137, column 2

    The young Oxonian, on the contrary, had led out one of his maiden aunts, on whom the rogue played a thousand little knaveries with impunity; he was full of practical jokes, and his delight was to tease his aunts and cousins; yet, like all mad-cap youngsters, he was a universal favourite among the women.

    1820 January 1, Geoffrey Crayon [pseudonym; Washington Irving], “Christmas Eve”, in The Sketch Book of Geoffrey Crayon, Gent., number V, New York, N.Y.: […] C[ornelius] S. Van Winkle, […], →OCLC, page 389

Synonyms & antonyms

nounA person who acts in a capricious, impulsive, or reckless manner.

More synonyms by meaning

adjectivecharacterized by undue haste and lack of thought or deliberation

nouna reckless impetuous irresponsible person

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

The noun is derived from mad + cap (“(informal) head”). The adjective is from an attributive use of the noun.

Full word history & related roots →

Translations

Bulgarian лудетина
  • лудетина (ludetina)person who acts in a capricious, impulsive, or reckless manner
Finnish huimapää
  • huimapääperson who acts in a capricious, impulsive, or reckless manner
Polish wariat, wariatka
  • wariatperson who acts in a capricious, impulsive, or reckless manner
  • wariatkaperson who acts in a capricious, impulsive, or reckless manner
  • narwaniecperson who acts in a capricious, impulsive, or reckless manner
  • ekscentrykperson who acts in a capricious, impulsive, or reckless manner
  • ekscentryczkaperson who acts in a capricious, impulsive, or reckless manner
Russian сумасбро́д
  • сумасбро́д (sumasbród)person who acts in a capricious, impulsive, or reckless manner
Cite this entry
APA

madcap. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/madcap

MLA

“madcap.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/madcap. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “madcap,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/madcap.

Source: madcap on Wiktionary, CC BY-SA 4.0.