fall over yourself

fall 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 teacher's pet, falling over himself to impress Mrs. Smith. My parents fell over themselves trying to seem cool to my friends. It was pretty embarrassing, to be honest.
See also: fall, over
Farlex Dictionary of Idioms.

fall over yourself

be excessively eager (to do something).
See also: fall, over
Farlex Partner Idioms Dictionary
See also:
  • fall over (oneself) to (do something)
  • fall over oneself
  • fall over yourself to do something
  • fall all over (oneself)
  • fall all over oneself
  • expend
  • fall over backward
  • fall over backwards
  • expend (something) for (something)
  • expend for