Buttinski

[Greta]

Originally a short, loudmouthed [Polish man] (first name unknown). Buttinski was famous for giving advice. As a matter of fact, it was rumored (rumoured?) that he was soon to be [the royal familys] advisor. However, [Buttinskis] advice soon went too far. In his [first week] on the job, he convinced Poland to join a war involving three other European countries. After Poland loss innumerable soldies in said war, Buttinski told the royals that they made a major mistake by joining the war. The queen blew up, demanding that Buttinski be punished. After all, it was Buttinski who recommended joining the war. The king, who was something of a [whipping boy], listened to his queen, and ordered Buttinski executed.
After news of Buttinskis execution had spread throughout all of Europe, the nickname Buttinski was used to imply that somebodys constant butting in could lead to their downfall. In those days, it was used as a warning.
However, as the 17th century began, Buttinski became more of a sarcastic label. When somebody would enter conversations without permission, they began to get called Buttinskis (Buttinskies?). It was used basically to show the [meddling] person that they were uninvited to a certain conversation.
The meaning is virtually the same nowadays, but friendlier. It still shows the person that they butt in to conversations too often, but it doesnt mean that the person should leave.