make a clean breast of something
If you make a clean breast of something, you tell the whole truth about it. `But what shall I tell my parents?' — `You'll have to make a clean breast of it, dear.' If you make a clean breast of your problems, creditors are much more likely to deal fairly with you.
make a clean breast of something (or of it)
confess your mistakes or wrongdoings. In former times, many people believed that the breast or chest was where a person's conscience was located. The breast is still used metaphorically to represent the seat of the emotions.
make a clean ˈbreast of something
admit fully something that you have done wrong: He decided to make a clean breast of it and tell the police.make a clean breast of something, to
To make a full confession. The word breast here is a synonym for “heart,” long considered the seat of private emotion and, by extension, secrets. Shakespeare referred to cleansing one’s bosom in Macbeth (5.3). The current cliché dates from the early eighteenth century.