Someone who, with one well timed, well aimed remark (shot) has the ability to disable and/or terminate a conversation.
Note: Not to be confused with Conversation Bomber.
Guy 1: Dude, that chick is bangin'!
Guy 2: I'd do things to her that would make a hooker think twice.
Conversation Sniper: She's not bad, but I think I would want to talk to her for a bit before hand just so I know I won't be stuck with some weird girl for the rest of the night.
Guy1: Kill Shot........