New TF2 drinking games

The Spicy Spy:
Every time you backstab a player and he/she switches to Pyro, take a shot. Every time you backstab a player and he/she switches to Spy, switch to Pyro, then take a shot for every team-mate you spy-check who is not a Spy.

The Bow'n'Arrow:
Every time you see a Sniper miss with the Huntsman, take a shot. Every time you see a Sniper shoot another class directly in the crotch with the Huntsman, take two shots. Every time you see a Sniper with the Huntsman get headshotted by a Sniper with the Rifle, cackle maniacally into your microphone. Every time you see a Sniper with the Huntsman get backstabbed while trying to light his arrow, remove an article of clothing. If no clothing is available, begin telling your deepest secrets over voicechat.

Just Five More Hours:
Every time someone besides you gets a 'drop' unlock, take a shot, then curse loudly into the microphone.

Hydrated:
If playing on TC_Hydro, take a shot every time you remark on what a godawful map it is. At the end of the match, remark how much better the map seems.

Gravelpit:
Drink heavily throughout an entire game of Gravelpit.

BAHAHAHAHA, yes!