Any phrase meaning that one's emotional reaction to something is death. As in, "It was so boring, I almost died!" or "That's so embarassing! If that happened to me I'd just die!".
Interweb(-s) and Internets (plural). Seriously... It's the InterNET (singular) and the World Wide WEB (also singular). And no, the terms are not synonymous. The www is part of the Internet, but so is usenet, non-web-based email services, IRC, etc, etc.
And as has been mentioned before:
"Epic", especially when followed by "win" or "fail". It's an epic victory/failure dammit! Assuming of course that it actually is epic to begin with, which it in all likelyhood isn't. On that topic, win and fail are verbs, not nouns, nor adjectives. "This thread is is win/fail", "This thread is full of win/fail"... Here's another one with the same meaning: "Me no speak English".
Fucking swear words fucking used as fucking filler, fucking know what the fuck I fucking mean?
... Oh, and the phrases "know what I mean?" and "know what I'm saying?".