madcap

American  

[mad-kap] / ˈmædˌkæp /

adjective

1. wildly or heedlessly impulsive; reckless; rash.

   a madcap scheme.

---

noun

1. a madcap person.

madcap British  

/ ˈmædˌkæp /

adjective

1. impulsive, reckless, or lively

---

noun

1. an impulsive, reckless, or lively person

Etymology

Origin of madcap

First recorded in 1580–90; mad + cap ¹

Example Sentences

With a major role in Josh Safdie’s madcap ping-pong riot, “Marty Supreme,” Paltrow is rounding out the year with a bang, earning her last laugh against gossip hounds and Goop critics.

From Salon

The madcap zeal that Madame Pernelle brings to the stage only intermittently returns to the production.

From The Wall Street Journal

Dubbed in different languages, the show captured children's hearts with its madcap battles.

From Barron's

Enemy fire has left him unable to consummate his love for Lady Brett Ashley, a former nurse who has turned herself over to a madcap Paris existence.

From The Wall Street Journal

The orchestrated madcap structure takes hold when backed by a running instrumental.

From Los Angeles Times