Definitions

1. noun

A person who behaves in a wildly unpredictable and unconventional manner, often in a charming or eccentric way.

“She was a madcap who traveled the world on a whim, taking in new experiences and cultures.”

2. adjective

Unpredictable and unconventional in behavior or actions; wildly eccentric.

“The madcap director’s latest film was a surprise hit, praised for its originality and creativity.”