1.RUDE/IMPOLITEa child who is sassy is rude to someone they should respect 〔小孩〕粗鲁的,无礼的SYN British English cheeky
2.ATTRACTsomeone, especially a woman, who is sassy is confident and does not really care what other people think about her 〔尤指女人〕自信的,不在乎别人看法的SYN feisty
Examples from the Corpus
sassy• His Farrow is smart, sassy and sexy, a woman who has learned how to turn her disability into an asset.• She was sassy and smart, and all the kids liked her.• a sassybrat• Her public image is that of a sassymystic, but she has the showbizmastery of a Gloria Swanson.• What Ida Rebecca saw was a frail little creature with her hair cut in the sassy new pageboybob.• The three journalists who interviewed Putin for this book were pleasingly sassy on occasion.• Becky was a sassy, rambunctious New York girl he'd met when visiting his aunt.• She looked sassy, she thought, as she swung her long jet hair, careful not to dislodge the jasmine.