A female who is perhaps a bit erratic impulsive spontaneous or reckless.

An all round lively and bouncy person, with a bit of a crazy side to her. (As others would see it..)
Syd Barrett would be an example of a Madcap Lad.

A Madcap Lass could be Courtney Love.
by LucyLeave November 25, 2011
Get the Madcap Lass mug.