back to the salt mines - to return to work or return to something else that you do not want to do We finished our lunch and went back to the salt mines. back up (someone or something) - to support someone or something The doctor made a mistake and the hospital refused to back him up. . bad blood (between people) - unpleasant feelings between people There was much bad blood between the three brothers. bad-mouth (someone or something) - to say bad things about someone or something The supervisor has the habit of bad-mouthing her boss. bag of tricks - a collection of special techniques or methods The.
