or back-scratch·er, back·scratch·er
a long-handled device for scratching one's own back.
a person who exchanges favors or services for mutual advantage.
Origin of back scratcher
First recorded in 1785–95
Related formsback scratching, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for backscratcher
/ (ˈbækˌskrætʃə) /
an implement with a long handle, used for scratching one's back
informal a person who provides a service, corporate or public money etc, for another, in order to receive a similar service or reward in return
Derived Formsbackscratching, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012