Conversation Thief

An individual who comes into a conversation and (Uncleverly) lays claim to all that was said. Like they brought all the information everyone was just discussing as their own. and worse?.....Believes that it were their own. this also can border line the grotesque acts of the "Conversation Vampire"!!!

Two people are standing there talking and a third person comes into the conversation, the third person nods head and agrees and within seconds begins to repeat what was said as it was their own idea, this is a "Conversation Thief". For it is obvious from the rest of the partakers in conversation that this individual lacks his or her own opinion, ideas, etc.