{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,
ON ONE'S CHEST
Meaning of ON ONE'S CHEST in English
Dictionary of English idioms . Словарь английских идиом. 2012