buttinsky

noun

1. (derogatory, informal)One who is prone to butt in, interrupt, or get involved where they are not welcome; a busybody.

   “I wish I had never met that nosy buttinsky!”

   “Well, all right then! If you think I'm a buttinsky, then I'll just butt in!”

   “"Shut up, Garrett. I never," said Mr. Tallboy, extricating himself from Garrett's grasp and giving him a playful punch in the wind, "in my life, met with such a bunch of buttinskis as you are in this department. Nothing is sacred to you, not even a man's business correspondence."”

   “It is never pleasant for a man of sensibility to find himself regarded as a buttinski and a trailing arbutus, and it was thus, I could see at a g., that Wilbert Cream was pencilling me in.”

2. (informal)A robust portable one-piece telephone instrument with clips, used by technicians and lines staff for testing telephone circuits or making a temporary connection to a telephone line.