It is slang, and should not be used in a business context. It is British English. I've not heard it in American English.
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It is slang, and should not be used in a business context. It is British English. I've not heard it in American English.
https://www.bbcamerica.com/anglophenia/2015/01/frasers-phrases-taking-mickey-mean
Where does "Mickey" come from? It's either rhyming slang,