The terms "going green" or "carbon footprint" drive me up a wall and I've no idea why.

Also annoying: most super-conservative image macros/copypastas that make the rounds on Facebook or that my Grandpa "helpfully" emails me on a weekly basis.

"Mary Sue" - hate that term as a writer, I could fill up a novel with why I hate this term and why everyone misuses it.

Anyways

Re: some of the other things mentioned in this thread:

I just don't use the word "literally" in my writing. Not because I don't know what it actually means, but because I don't want to inadvertently trigger the Grammar Nazis.

Nobody has ever asked me if I'm going to have kids. Actually I get the opposite: people tell me NOT to, which is ironic because I actually do want a kid or two at some point. I think it's because I look like I'm about 17.