definition of
madcap

[1] #1 madcap n. [daredevil, hothead, swashbuckler, lunatic, harum-scarum] a reckless impetuous irresponsible person. wn

[2] #2 madcap s. [hotheaded, impulsive, impetuous, tearaway, brainish] characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; ('brainish' is archaic). wn