WordWeb Online

1. An impudent or insolent rejoinder
   "don't give me any of your sass";
   - sassing [N. Amer, informal], backtalk [N. Amer, informal], back talk [N. Amer, informal], lip [informal], mouth, backchat [Brit, informal]

1. Answer back in an impudent or insolent manner
   "don't sass me!"; "The teacher punished the students who were sassing all morning"

Derived forms: sasses, sassed, sassing

Type of: answer, comeback, counter, rejoinder, replication, reply, respond, retort, return, riposte

Encyclopedia: Sass, Richard