cool it (慣用句等) のんびりする, うちとける Idiom: cool it (俗語) 1. To calm down; relax. 2. To stop doing something.

smart off 生意気な口を利く Phrasal Verb: smart off [会話]To speak or act impertinently.

diddly-squat 何も価値ない, 無駄足 did・dly-squat 名詞[俗語] A small or worthless amount.