Orginally created by a group of sudents at a school in Scotalnd. The term, "You're a Mr Burns" refers to a Mr Archie Burns, his teaching habits were most confusing, as a result he caused the failings of many pupils standard grades. (GCSEs, Exams etc.)
The name is often accompanied by "Oaooh" or any word which uses the "o" in the same way as "boot" as he was well known for the rather odd pronounciation of names, i.e "Natal don't dooooo that," or "Noootes jotter."
The most famous of his quotes would be, "You're goooing to fail your standard grades." Which would quickly be accompanied by a strange hand gesture and "Seeeven" (Basically a fail grade on your exams.")
Uses of the word "Mr-Burns" includes, "You're such a Mr-Burns" or "Archie Buuurns."
Usually his name is pronouced phonetically as the following, Mr b-ooo-rrns. Also uses of his name are used to comment on someone who simultaniously switches between outfits that look exactly the sames, i.e "You're wearing the exact same thing as on Saturday, you're such a Mr Burns."
Noted by student of Mr Burns, Miss Shannon, his usual attire is that of a light blue shirt, dark blue tie, jeans, mountain "boooots" and in his breast pocket a red and blue pen.
Rebecca: So Shannon, what do you think you'll get in the exam?
Shannon: "Mr-Burns says seeeeven."
Calum: So why do you think you'll fail the test?
George: Mr-Buuurns (Note, it can be universally used as an excuse to your failings.)
Rachael: A woo hooooo.
Lewis: You best stop that Rachael or you know what'll happen.
Rachael: *Nods* (Angry) "OAAAHHHH!" *Makes hand gesture.* (Note, any actions linked to him will justify what it is you're trying to say.)