Here's some of the terms you'll be hearing in your TF2 adventures explained:

Squeaker
Newb vs. Noob
Teabagging
Camping

(Yeah old stuff, but I'm not yet up-to-date with Ctrl+Alt+Comics... I'm soon there though hehe)

lol teabagging

I've yet to see this in tf2, doesn't really have the same effect since you don't carry on looking through your characters eyes after you die.
Damn i got banned so many times for doing this in bf2, some clans just don't like getting pwn'd on their own server.

BF2's the only game I've seen it done, excessively or even at all. I don't think it was popular when I was playing BF1942 when it first came out.

I guess there's no point in doing so in TF2 because the death cam goes to the person that killed you (but I never get any cool ones to make it worth pressing F5 ). I seem to remember in BF2 that when you died your "deathcam" was just the scene viewed from your current perspective, until you respawned(?) so if you were laid on your back your teabagger would achieve the effect they wanted.

I don't think I could get any pleasure whatsoever from placing my testicular carrier bag in another man's oral orifice. Either in the real world or virtually.

Realworld: thankyou but no
Virtually: To wind up the opposite team in a match or just having fun with your mates Hell Yeah. especially when you've been on the receiving end of it.