A person who forces themselves onto other people conversationally. They will intrude in your personal sphere by forcing conversation (usually of low quality) onto you.
I came into work this morning hoping for some peace and quiet and I had to endure it in both ears from John and Janet. It was like I was being spit roasted by them. They're such conversation rapists.
A Conversation Killer is a person who starts a conversation knowing full well that it is going absolutley no where!! (they will always deny killing the conversation)
<Mr L> hey
<Miss J> hello <Mr L> so....
<Miss J> ur such a conversation killer
<Mr L> i so did not!!
Someone who interrupts conversations in the most irritating way imaginable, and somehow kicks you out of your own conversation.
A: Hey
B: Hey
A: Yeah so the other day I was -
C: HAAAYY, B WHATS UPP
A:...........
B: Oh not much not much, how've you been?
A: ...............! *whispers to self* what a conversationrapist...