Language: en
Meaning: (idiomatic)To stay out oftrouble, especially by avoidingunlawfulbehavior.1947, American Correctional Association,American Journal of Correction, page 6:They tell us, "Keep your nose cleanand you'll no doubt make a parole." So wekeep our noses very clean.2008November 5, Nathan Thornburgh, “Ted Stevens Sins, and (Likely) Wins”, inTime, retrieved25 August 2013:Alaska Congressman Don Young . . . spent a huge share of his campaign donations on legal fees tokeep his nose cleanin the face of an FBI investigation into his dealings.
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