The Oxford Thesaurus An A-Z Dictionary of Synonyms - sauce n.

1) gravy, condiment: That sauce on the meat was truly delicious. 2) impertinence, sauciness, impudence, audacity, insolence, brazenness, pertness, disrespect, disrespectfulness, Colloq cheek, cheekiness, lip, back talk, backchat, brass, nerve, gall, Slang crust, US and Canadian sass, sassiness: She had the sauce to tell me to pay at once or get out.