adjective
brash
BRASH/bræʃ/
Unpleasantly bold or showy, with little regard for others.
The brash woman interrupts her colleague with an expansive gesture and overconfident grin.

Etymology
The word's origin is obscure; its early recorded meaning was 'impetuous' or 'hasty in temper.' That emphasis on rash behavior remains in today's sense of rude, overconfident boldness.
In context
Kevin Readington's doing a good job, that hate Kevin, just not it's not there. I mean, there's plenty of people online that can't stand >> and he even says he's brash. He's a bit of a bully in the courtroom.
More examples
- She finds the advertisement's brash colors overwhelming.
- The brash newcomer interrupts before hearing the explanation.
- He grows less brash as he learns to listen.
Forms
brash · brasher · brashest
Similar words
- brazen
- More strongly suggests shamelessness or open defiance.
- brusque
- Brusque is abruptly blunt in manner; brash is boldly inconsiderate or showy.