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Phrase(s): (just) taking care of business Fig. doing what I am supposed to do; an answer to the question "What are you doing lately?" (Also abbreviated T.C.B.) • Bill: Hey, man. What you been doing? Tom: Just taking care of business. • Andy: Look, officer, I’m just standing here, taking care of business, and this Tom guy comes up and tries to hit me for a loan. Tom: That’s not true!
McGrawhill's American Idioms And Phrasal Verbs