Bouncing ideas back and forth, brainstorming. "Let's get together and bounce some ideas around" "Sure, it will be like ping-pong with ideas" "You could call it Idea-pong!"
"Hey we have to figure out a way to get Parker to dump Janice so you can date him"
"Oh I know, but I can't seem to think of anything"
"Well how about we play some Idea-Pong this weekend, then we can get some ideas"