You should get absolutely smashed and make a complete tit of yourself, walk into the ladies bathroom, piss on the plantpots, etc. And anytime anyone gives you a dirty look, just scream, "What are they gonna do? FIRE ME?!" And then laugh manically, ideally just before throwing up over your ex-boss.
Heh, needed that edit!
Very tempted to, my final day is on the 9th of Jan, starting the new job the monday after, the big tightarses!
Ah well, having booked off most of Xmas, I've only got 2 working weeks (10 days) left in this place, let the good times (and more slacking) roll!