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Someone who is a busybody, looks over shoulders, always wants to hear what is going on. Can be used for many other things. To describe someone who has an unpleasant or annoying attitude.
"Why are you looking over my shoulder? Quit being such a Polonius!"

"Why are you still talking, you Polonius fool?"

"You need to drop this Polonius attitude."

Person 1: "Keep it 235! Homeslice!"

Person 2: "Shut up, you sound Polonius"
by PeatMoss October 03, 2012