See: BEND OVER BACKWARD.
{v. phr.}, {informal} To try so hard to avoid a mistake that you make the opposite mistake instead; do the opposite of something that you know you should not do; do too much to avoid doing the wrong thing; also, make a great effort; try very hard. * /Instead of punishing the boys for breaking a new rule, the principal bent over backward to explain why the rule was important./ * /Mary was afraid the girls at her new school would be stuck up, but they leaned over backward to make her feel at home./ Compare: GO OUT OF ONE'S WAY.