You are worse than the person you're describing if you can't muster the courage to tell them any of this to their face. Anonymous is not the answer, mature communication is. Imagine what the people you know must say about you when you're not around?
That's pretty pathetic, talking shit about someone behind their back...I bet none of your friends trust you because they know how you talk shit about other people...
You are, in your entirety, an asshole. Speak up or try and educate this person on said 'buzzwords". They are probably trying to fit in/ insecure/ would like your acceptance because, wrongfully, they believe you are somehow "cool". Prick.