/ ˌɪndɪˈskreʃn; NAmE / noun
1.
[ C ] an act or remark that is indiscreet , especially one that is not morally acceptable :
youthful indiscretions
2.
[ U ] the act of saying or doing sth without thinking about the effect it may have, especially when this embarrasses or offends sb :
He talked to the press in a moment of indiscretion.
—compare discretion
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WORD ORIGIN
Middle English : from late Latin indiscretio(n-) , from in- (expressing negation) + discretio separation (in late Latin discernment), from discernere separate out, discern.