madcap

[ mad-kap ]
/ ˈmædˌkæp /

adjective

wildly or heedlessly impulsive; reckless; rash: a madcap scheme.

noun

a madcap person.

Origin of madcap

First recorded in 1580–90; mad + cap1

Example sentences from the Web for madcap

British Dictionary definitions for madcap

madcap
/ (ˈmædˌkæp) /

adjective

impulsive, reckless, or lively

noun

an impulsive, reckless, or lively person

Word Origin for madcap

C16: from mad + cap (in the figurative sense: head)