fall over yourself to do something
fall over (oneself) to (do something)
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 teacher's pet, falling over himself to impress Mrs. Smith. My parents fell over themselves to try to seem cool to my friends. It was pretty embarrassing, to be honest.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
fall ˈover yourself to do something(informal) do everything you can for somebody because you want to please and impress them: After he became manager, people were suddenly falling over themselves to help him.
Farlex Partner Idioms Dictionary © Farlex 2017