竹升

Etymology
. Originally as : “bamboo pole” > “Chinese person raised overseas” (the inside is hollow like bamboo poles, signifying the lack of Chinese culture in their knowledge).

The word was changed to 竹升 (“bamboo rise”) for taboo reasons, since and  sound alike in Cantonese.

Noun

 * 1) thick bamboo pole
 * 2)  jook-sing overseas-born Chinese person