1. Yo. This one is mostly at work. I have no one to blame for this. Usually I answer the phone in a professional tone with my name. But, if I KNOW who's calling, and they're cool, I say "Yo". Unless my brother calls. Then I answer the phone with a gruff and aggressive "Megatron!" (to which he replies: "Prime!")
2. Dude. I blame J all the way for this. My usage can be traced back to my move to the Boston area and clearly originated with her. I have been struggling with this for two years and I hope that '09 sees its end. The thing is, it's a filler word, and my fear is that I will replace it with something worse. Erg!
3. Erg/Erm. It's a cat noise and I'm blaming A. She started it with her work pals, then told me about it, and I was quite charmed by the open-to-interpretation-ness of the noise-instead-of-word thing that I have embraced it. I mostly use it when I have a mixed-emotion reaction, or as a sympathetic sound in conjunction with head-petting. Sometimes I use it when I just don't want to speak.
4. True Story. I think this came from watching a lot of tv as a child. I haven't regularly watched tv in a couple of years, but I imagine that there are still plenty of "true story" type shows of the same variety that captured my attention then. Now I say it (way too often) when I want to convey agreement or support.
5. Dig. Do you dig it? I dig it. Am I trying to be a throwback to another era of vocabulary? I don't know. But I say this an awful lot.
On a different note, have you ever thought of winter storms (which are on their way, have no doubt) as violent and personal (as in, "they're out to get me!") and of snowflakes as little throwing stars with sharp edges? No? Really? Um, no. Me neither.