get something off your chest
get (something) off (one's) chest
To reveal or discuss something that has caused one emotional discomfort and that one has repressed, kept hidden, or neglected to discuss earlier. I'm sorry but I just have to get something off my chest. How could you treat me like that last night?
get something off your chest
COMMON If you get something off your chest, you talk about a problem that has been worrying you for a long time, and you feel better because of this. My doctor gave me the opportunity to talk and get things off my chest. Sarah certainly seemed as though she had a lot to get off her chest.