www.angelfire.com/on/topfen/idioms04.html
it's raining cats and idioms

 
You scratch my back and I'll scratch yours

 
Examples:

Manfred:
"I don't want to do my English homework this week.
Will you do it for me, Rainer?"

Rainer:
"Only if you do my Physics homework.
You scratch my back and I'll scratch yours!"

 
Use:

We use this idiom to tell someone that if you help us
then we'll help them in return.

Next       Idioms index       Previous

If you like idioms then sign up for my weekly newsletter. You'll get a new idiom every week, together with three jokes and a short test.