A person who walks into the room and says a few words. They usually are not a complete sencence and make you ask them about what they are talking about. In turn sniping you into a conversation about something.
(the sniper walks into the room and says) "so hot" (you ask) whats so hot? "oh this girl I met at the mall. I got her number and we're going to hang out later" (you have now just been sniped)