bounce something back and forth
1. Lit. to bat, toss, or throw something alternately between two people. (Usually a ball.) The two guys bounced the ball back and forth. John and Timmy bounced it back and forth.
2. Fig. to discuss an idea back and forth among a group of people. Let's bounce these ideas back and forth awhile and see what we come up with. The idea was bounced back and forth for about an hour.