adjective

self-assertive in a rude, noisy, or overbearing way.

he was brash, cocky, and arrogant

self-assertive,assertive,cocksure,full of oneself,self-confident,arrogant,thrusting,bold,as bold as brass,audacious,brazen,brazen-faced,forward,impudent,insolent,impertinent,rude,cheeky,cocky,pushy,brassy