also: をよいことに
expression
taking advantage of ...; using ... as an excuse
Used to indicate that someone exploits a situation, often with a negative connotation. The preceding noun or clause describes the favorable circumstance being taken advantage of.
彼は上司が不在なのをいい事に、早退した。
Taking advantage of his boss's absence, he left work early.
親が甘いのをいい事に、子供は何でも買ってもらえると思っている。
Taking advantage of their parents' leniency, the children think they can get anything they want.
A common variant where the preceding clause is nominalized with の; essentially the same meaning and usage.
Means 'to take advantage of someone's weakness' or 'to exploit'; more direct and often more negative than をいい事に.
A grammaticalized phrase from を (object marker) + いい (good) + 事 (thing) + に (adverbial particle), literally 'making it a good thing that...', which developed into 'taking advantage of...'.