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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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
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