Haha! I'm not at all.

We get that speak here too. Not a regional thing, more a cultural thing. Chav mostly.

"I ain't never not done nuffin or sumfin or nuffin"

usually being the blunt of it. It's like a battle to see how many negatives you can fit in a sentance, which most of the time ends up in an unwilling admittance of guilt through the use of the amount of negative, negative, negative, negatives.