cocksure
cock-sure
adjective
Excessively confident or arrogant, especially without good reason or evidence.
"He was cocksure about his victory, despite little preparation."
Thesaurus
Synonyms: confident, overconfident, positive
cock-sure
Excessively confident or arrogant, especially without good reason or evidence.
"He was cocksure about his victory, despite little preparation."
Synonyms: confident, overconfident, positive