三胡
- 网络three-stringed fiddle; ga sei wu
三胡三胡
three-stringed fiddle
...a poor player by saying "三胡" (three-stringed fiddle) instead of "二胡".
ga sei wu
So, later, talking about the three "Hu" or 轧三胡 (ga sei wu) became a popular term used to describe people gossiping.