'Wot' is 'what', spelled the way it sounds when someone says it quickly and casually. It is not a different word and it does not mean anything new — the whole point of it is how it looks. Writers use it to show a speaker who is working-class, uneducated, cheeky, or joking: "Wot you looking at?", "Wot's all this then?" You see it in comics, cartoon captions, graffiti, song titles, jokey text messages and online chat. Perhaps its most famous appearance is the old wartime graffiti 'Wot, no bananas?' — a complaint about shortages, later borrowed by the Kilroy cartoon. In writing it very often carries a raised eyebrow: surprise, mockery, or playing dumb on purpose. Two important warnings for students. First, never use it in an essay, an email, an exam, or anything you want taken seriously; it will read as an error, not as style. Second, there is a completely separate old verb 'wot' meaning 'to know' — it survives in the fossil phrase 'God wot' and in old poetry, and you can safely ignore it except as a curiosity. Native speakers who write 'wot' are almost never spelling badly by accident; they are choosing the spelling for its voice. When you are learning, it is enough to recognise it and read past it — the meaning is simply 'what'.