I want them to say what is on their heart

This was heard on a local NBC station, showing an interview with Nick Sirianni, the Philadelphia Eagles football coach the night before the Super Bowl. Sirianni said that he wants his players to get up in front of the team tomorrow and say what is “on their heart”. This is a mashup of “on (one’s) mind” (in one’s thoughts) and “in (one’s) heart” (in the deepest part of one’s feelings or beliefs). I think “wear (one’s) heart on (one’s) sleeve” (to openly desplay emotions) is also in the mix given the context. A big thank you to Bruce Ryan for hearing this one and sending it in!