"Class = accent, and having been to a proper school"

Now, cruel experience has taught me that I can be a little slow on the uptake here, so, before I spit my tea all over my keyboard, please tell me you're being ironic, speaking tongue-in-cheek, playing devil's advocate, taking the mickey or piss out of me, striking a pose, just joshin', shooting a line of bull, having or leading me on, pulling my leg, yanking my chain, and/or stringing me a line.