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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012