to do something that makes your moral standards lower They have stooped to using threats of violence in order to get their way.
Usage notes: often used in the forms stoop to someone's level or stoop to the level of dong something: The president shouldn't stoop to the level of exchanging insults.
Etymology: from the literal meaning of stoop(to bend forward and down to make yourself smaller)
To do something degrading or reprehensible to achieve one's ends: It's a shame that the museum has to stoop to cheap gimmicks in order to attract visitors.