/ˈmædˌkæps/
NOUN
People who behave impulsively, hastily, or unpredictably, often acting without considering the consequences.
Refers to people who take bold risks, act spontaneously, or pursue daring adventures without much regard for possible consequences.
NOUN
People regarded as mentally unstable, irrational, or wildly eccentric.
Used informally, sometimes humorously or disparagingly, to describe people whose behavior appears extremely irrational, uncontrolled, or detached from reason.