SASSY

fresh, impertinent, impudent, overbold, smart, saucy, sassy, wise

(adjective) improperly forward or bold; “don’t be fresh with me”; “impertinent of a child to lecture a grownup”; “an impudent boy given to insulting strangers”; “Don’t get wise with me!”

Source: WordNet® 3.1

Etymology

Adjective

sassy (comparative sassier, superlative sassiest) (originally, US)

Bold and spirited, cheeky, impudent, saucy. [from 1833]

Somewhat sexy and provocative.

Lively, vigorous.

Source: Wiktionary