keep one's nose clean

keep one's nose clean  {v. phr.},  {slang}
To stay out of trouble; do only what you should do.
The boss said Jim could have the job as long as he kept his nose clean and worked hard.
The policeman warned the boys to keep their noses clean unless they wanted to go to jail.
Compare: STEER CLEAR OF (2).
Categories: nose {slang} {v. phr.}