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1.
A person who is suddenly, and probably artificially, very friendly to you or another person. Usually only used when the prior relationship was less than friendly or when the person is trying to get something.
Annie: Let's see a movie tonight.
Betty: What about Chloe? Don't you want to invite your new best friend?
Annie: As if.
by raindog469 February 25, 2006
 
2.
also see new favorite person / new favourite person

term of acceptance coming after someone has praised the works or acts of the author or speaker.
Great Idea! I'll get to work on it right away!


You, sir, are my new favourite peson.
by Gumba Gumba April 10, 2004