brash (adj.)

• abrupt
• aggressive
• arrogant
• audacious
• bearish
• beastly
• bluff
• blunt
• bold
• brassy
• brazen
• brusque
• bumptious
• cavalier
• challenging
• cheeky
• churlish
• cocksure
• cocky
• contemptuous
• crusty
• curt
• daring
• defiant
• derisive
• disdainful
• disrespectful
• ebullient
• effervescent
• flip
• flippant
• forward
• fresh
• gratuitous
• gruff
• harsh
• hasty
• headlong
• high-spirited
• ill-advised
• impertinent
• impetuous
• impolitic
• improvident
• imprudent
• impudent
• impulsive
• incautious
• inconsiderate
• indiscreet
• injudicious
• insolent
• madcap
• maladroit
• nervy
• overbold
• overconfident
• overweening
• pert
• precipitate
• presumptuous
• pushful
• rash
• reckless
• rough
• rude
• sassy
• saucy
• self-asserting
• self-assertive
• severe
• sharp
• short
• smart
• surly
• tactless
• temerarious
• thoughtless
• truculent
• uncalled-for
• undiplomatic
• untactful
• unwary
• uppish
• uppity
• vivacious