To bend over backwards is to try extremely hard to please somebody. Bend over backwards to help, bend over backwards for the customer.
It usually carries a hint that the effort went unappreciated. The exaggeration is the point, since nobody could actually work in that position.
1phrasebend over backwardsTo try extremely hard to please someone.
“The staff will bend over backwards if you ask them properly.”
bend over backwards is a phrase.
Practised in Idioms