How about a fauxhawk like so many other style vacuums out there. There is nothing cooler than copying what someone was doing months ago. Don't forget the blonde tips.
Perhaps a tattoo just above the arse is more your style. To really stand out I recommend some malformed chinese characters so your friends will know you are available with extra fried rice.
However, if you really want to place yourself at the cutting edge of fashion you can't go past a non-reactive food allergy. All the social benifits of a regular food allergy with the bonus of being able to eat the food you are allergic to.
Here's how it works in a typical social situation:
I'll have the burger with everything on it please. Oh but no egg, I can't
have egg, I'm allergic to egg, even the tiniest bit and I'll die. Can I
get extra mayonnaise on that please.
The hot tip for next season: diabetes.