BEND OVER BACKWARDS is a phrase that is used to describe someone who is going out of their way to help or accommodate someone else. The two crossword solutions for this phrase are LIMBO and ARCH. LIMBO is a dance in which participants BEND OVER BACKWARDS while arching their backs in order to pass under a horizontal bar. An ARCH is a curved structure that is often used as a doorway or window. Both of these words can be used to describe the physical act of bending OVER BACKWARDS.