conversatanist
Someone who is very quick witted and evil when speaking in a conversation.
Baka-Chan is a devious conversatanist
Conversatanist
A person who tempts you with sweet words and then leads the chat into sinful territory. Slyly uses innuendo and double talk to get you thinking lustily in what would have otherwise been a normal, friendly conversation.
"Peter in such a conversatanist! He asked if I knew the outcome of the match and next thing I know we're discussing MY World Cups!"