make a clean breast of

make a clean breast of  {v. phr.}
To admit (your guilt); tell all about (your wrong doing); confess everything.
The police caught the hit-and-run driver and he made a clean breast of his crime.
Arthur worried because he cheated on the test, and finally he went to the teacher and made a clean breast of it.
Compare: OFF ONE'S CHEST.
Categories: verb
Source: A Dictionary of American Idioms

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