Where do you get off?
Where does (one) get off (doing something)?
How dare one be so brazen, impudent, or rude as to do or say the offensive or disreputable thing indicated? I mean, where does she get off trying to tell us how to run our company? I've never been so insulted before in my life. Just where do you get off?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Where do (you think) you get off?
Inf. What do you think you are doing?; Who do you think you are? (A sharp reply to something offensive or impolite.) How rude! Where do you think you get off? Where do you get off, talking to me like that?
See also: get
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.