idiom > (originally) a sarcastic remark by mencius about xu xin, a southerner-- those who speak a different tongue than one's own Jueshe
Contents
Nanman 鴂 tongue
  Explanation: Difficult to understand people speaking ridiculed old Southern dialect. Gui, Shrike.
No. 2
  【南蛮鴂舌
  【拼音】nán mán xiāng shé
  【解释】旧时讥人操难懂的南方方言。鴂,伯劳鸟。