Damian

a kid who most likely goes to a smart school and is fairly smart but acts like a dumbass. He is most likely a self-conscious bitch who says he's really fat but in reality he actually isn't. He will make you laugh most of the time but he can really overstep his boundaries. Also never trust him with your secrets, he can't keep them. But overall, Damian is a pretty swell guy.

Todd: "Bro, i just told Mike a big secret and he told the whole school!"
Jeffery: "Wow, he is such a Damian."