to be behaving in a way that is likely to cause problems for you.
Greg's riding for a fall - he gets to work late and spends hours talking to his friends on the phone.
be riding for a fall
To be behaving in a way that will likely result in a problem or conflict. With the way he keeps skipping school, he is definitely riding for a fall.Jennifer is riding for a fall—you can't start rumors about half the school without repercussions.
be riding for a ˈfall
behave in a way which will cause problems for you later: He’s riding for a fall if he keeps talking to the boss so rudely.