Definition of sass:
(n) :
cheek, back-talk
"*"Looky here -- mind how you talk to me; I'm a- standing about all I can stand now -- so don't gimme no sass."
— The Adventures of Huckleberry Finn, Mark Twain"
"*"The duke he begun to abuse him for an old fool, and the king begun to sass back, and the minute they was fairly at it I lit out and shook the reefs out of my hind legs, and spun down the river road like a deer, for I see our chance"