[1] : WordNet (r) 2.0

sass
     n : an impudent or insolent rejoinder; "don't give me any of
         your sass" syn: sassing, backtalk, back talk, lip,
          mouth
     v : answer back in an impudent or insolent manner; "don't sass
         me"; "the teacher punished the students who were sassing
         all morning";
see also:
sassing backtalk back talk lip mouth 

Sass >> S Words
Sass, definition of term: Sass
sass_pag1.html