It's from a well known british comedy show (Harry Enfield and Chums) from the early nineties which had a sketch called "The Scousers" where 3 scouse brothers would always end up fighting with one of them saying to the others "All right, all right, calm down, calm down!"
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Now I get it. Ha! :D I wonder. Was that scouser just playing his role or was he really pissed off?