swap horses

All's fair in a horse trade, an' friends didn't orter swap horses widout they kin stand the shkinnin'.

Men exchange partners with each other much in the manner that men in other countries swap horses.

The Kentuckian will come to county court "to swap horses;" it is in the blood.

He did not propose to swap horses or watches or jack-knives, but he would swap ideas with you day in and day out.

The people this time were like the Dutch farmer,—they believed that "it was not best to swap horses when crossing a stream."