Cavalier
/ˌkævəˈlɪəɹ/
noun
A military man serving on horse, early modern cavalry officers who had abandoned the heavy armor of medieval knights.
A gallant: a sprightly young dashing military man.
A gentleman of the class of such officers, particularly:
verb
Of a man: to act in a gallant and dashing manner toward (women).
adjective
Not caring enough about something important.
High-spirited.
Supercilious.
Synonyms: brusque, curt, disdainful, haughty