MADCAP
hotheaded, impulsive, impetuous, madcap, tearaway, brainish
(adjective) characterized by undue haste and lack of thought or deliberation; âa hotheaded decisionâ; âliable to such impulsive acts as hugging strangersâ; âan impetuous display of spending and gamblingâ; âmadcap escapadesâ; (âbrainishâ is archaic)
daredevil, madcap, hothead, swashbuckler, lunatic, harum-scarum
(noun) a reckless impetuous irresponsible person
Source: WordNet® 3.1
Etymology
Adjective
madcap (comparative more madcap, superlative most madcap)
impulsive, hasty or reckless; capricious.
Usage notes
Especially used for adventurous activities.
Noun
madcap (plural madcaps)
An impulsive, hasty, capricious person.
(obsolete) An insane person, a lunatic.
Source: Wiktionary
Mad"cap`, a.
1. Inclined to wild sports; delighting in rash, absurd, or dangerous
amusements. "The merry madcap
Definition: lord." Shak.
2. Wild; reckless. "Madcap follies" Beau. & Fl.
Mad"cap`, n.
Definition: A person of wild behavior; an excitable, rash, violent person.
Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition