the insidiot did everything in her power to ruin her ex-husband's business with no regard for the ill-effects it would have on her financial health
a person who knowingly acts in a devious and treacherous way to sabotage another person's well-being while simultaneously putting their own well being at risk
"the insidiot did everything in her power to ruin her ex-husband's business with no regard for the ill-effects it would have on her financial health" What is the definition of "insidiot"?