cheeky (adj.)

• arrogant
• audacious
• bluff
• bold
• brash
• brassy
• brazen
• bumptious
• challenging
• cocky
• contemptuous
• crusty
• daring
• defiant
• derisive
• disdainful
• disrespectful
• flip
• flippant
• forward
• fresh
• gratuitous
• impertinent
• impudent
• insolent
• nervy
• pert
• rude
• sassy
• saucy
• smart
• uncalled-for
• uncivil