scratch someone's back

:  to scrape or dig with the claws or nails

:  to rub and tear or mark the surface of with something sharp or jagged

:  to scrape or rub lightly (as to relieve itching)

:  a mark or injury produced by scratching

:  a slight wound

:  scrawl, scribble

:  arranged or put together with little selection :  haphazard

:  made as or used for a tentative effort

:  made or done by chance and not as intended

:  some person :  somebody

:  the rear part of the human body especially from the neck to the end of the spine

:  the body considered as the wearer of clothes

:  capacity for labor, effort, or endurance

:  to, toward, or at the rear

:  in or into the past :  backward in time

:  ago

:  being at or in the back

:  distant from a central or main area

:  articulated at or toward the back of the oral passage :  formed deep within the mouth

:  to support by material or moral assistance

:  substantiate

:  to assume financial responsibility for