Words/phrases that twist my knickers:
blog - who's the effing genius that came up with that one? Just say "web log" or "diary" FFS.
epic - especially when used in conjunction with "fail"
fail - especially when used in conjunction with "epic"
gay - used to mean "happy", now it means four or five different things.
epic - did I already mention this one?
consumer - I don't know why, it just pisses me off
no beer tonight, honey - pretty much means the relationship is an
epic fail... oh dammit!
modders - when used in conjunction with "will fix XYZ game"
There's five seconds of your life you'll never get back. You're welcome.