cocksure

 
Pronunciation: /kɒkˈʃɔː, kɒkˈʃʊə/

adjective

  • confident in an excessive or arrogant way: the cocksure golf prodigy from California

Derivatives

cocksurely

adverb

cocksureness

noun

Origin:

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