sass /sæs/noun 4verb 2forms 3 noun4 •The quality of being sassy.This girl has a lot of sass. •(US) Backtalk, cheek, sarcasm.Say—if you give me much more of your sass I'll take and bounce a rock off'n your head. — 1876 •A subgenre of screamo music. •(no longer used) Vegetables used in making sauces. verb2 •(US, informal) To talk, to talk back.“But, good land! what did he want to sass back for? You see, it couldn’t do him no good, and it was just nuts for them.” — 1894 •(US, informal) To speak insolently to.Don’t sass your teachers! formssassed · sassing · sasses