on one's chest

on one's chest  {adj. phr.},  {informal}
Hidden in your thoughts or feelings and bothering you; making you feel worried or upset; that is something you want to talk to someone about.
Jane looks unhappy because she has the quarrel with Susan on her chest.
"Well, Dave," said the coach, "You look sad — what's on your chest?"
Compare: ON ONE'S MIND
Contrast: OFF ONE'S CHEST
Categories: bother {adj. phr.} {informal}