滿ㄇㄢˇㄈㄨˋㄌㄠˊㄙㄠmǎnfù‑láosāo

满腹牢骚
  1. 一肚子怨言形容失意情緒鬱悶 覺得自己懷才不遇所以滿腹牢騷」。

lit. belly full of complaints (idiom)​, discontent, always moaning and complaining
voller Missmut