cocksure
/ˌkäkˈSHo͝or/
adjective
adjective: cock-sure
- presumptuously or arrogantly confident.”the cocksure golf prodigy from California”
Origin

early 16th century: from archaic cock (a euphemism for God ) + sure; later associated with cock1.
/ˌkäkˈSHo͝or/
adjective
adjective: cock-sure
Origin

early 16th century: from archaic cock (a euphemism for God ) + sure; later associated with cock1.