陳谷子爛芝麻 [陈－－烂－－]

Jyutping can4 guk1 zi2 laan6 zi1 maa4
Pinyin chén gǔ zi làn zhī ma

Definitions (CC-CEDICT)
  1. lit. stale grain, overcooked sesame (idiom); fig. the same boring old gossip