Conversation jumper

That one annoying asshole who no one talks to and just jumps into conversations that they weren’t involved in not to mention no one was talking to them and they do this because they’re lonely as fuck

John: "So, Sarah, what do you think about going hiking this weekend?"

Sarah: "I'm all for it! The weather should be perfect."

Mark: "Hey, guys, have you ever tried rock climbing? I hear it's a great workout!"

John: *whispers to Sarah* "Looks like we've got a conversation jumper on our hands."

Sarah: *nods* "Yeah, it seems like Mark just can't resist jumping into our conversations."