new one on

a new one (on me)

Something I was not aware or informed of or knew nothing about until just now. A: "Yeah, Jeff and Anthony have been going out for a few months now." B: "That's a new one—I thought they were just friends." Having to pay for the water you use in your house is a new one to me—is that an American thing or something?
See also: new, one
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

new one on someone something

that one has not heard before and that one is not ready to believe. Bob's talk of poverty is a new one on me. He always seems to have plenty of money. The firm's difficulties are a new one on me. I thought that it was doing very well.
See also: new, on, one
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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