fall all over oneself

fall all over (oneself)

To expend an inordinate amount of energy or effort to do something, especially as a means of gaining attention or approval. John is such a brownnoser, falling all over himself to impress the teacher. My parents fell all over themselves trying to seem cool to me and my friends. It was pretty embarrassing, to be honest.
See also: all, fall

fall all over oneself

Also, fall over backwards. Make an inordinate effort to do something, try very hard or eagerly. For example, They fell all over themselves to be helpful, but only got in the way, or She fell over backwards trying to please her boss, but it got her nowhere. The first of these hyperbolic expressions dates from the late 1800s, the second from the mid-1900s.
See also: all, fall