不吐不快
bù​tǔ​bù​kuài

to get it off one's chest

  1. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  2. 吐 tǔ verb
    to say
    to say or speak out; to tell; to express one's thoughts or feelings; to utter words
  3. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  4. 快 kuài
    satisfied
    to one's heart's content; gratified by having a desire or grievance fulfilled