scratch someone's back

Do someone a favor in hopes that a favor will be returned. For example, I don't mind driving this time-she's scratched my back plenty of times. It also is put as you scratch my back and I'll scratch yours, as in If you do the laundry I'll do the cooking-you scratch my back and I'll scratch yours. This idiom was first recorded in 1704.

Common Names:

Name	Pronounced	Usage
Hercules	HUR-kyə-leez (English)	Roman Mythology
Mariah	mə-RIE-ə	English
Pistis	-	Greek Mythology
Suibhne	SIV-na (Irish, Scottish)	Irish, Scottish, Ancient Irish
Balderston	['bɔ:ldəstəun]
Cervantes	[sə:'væntiz]