Xue Sheng
All weight is underside
I too like Ramsey Dewey."Sifu" for cabbies? May be a regional thing, or more likely, generational Language usage changes fast these days.
Anyway, here's a clip from the controversial, opinionated, and (in my opinion) entertaining Ramsey Dewey, an MMA coach in Shanghai China. It's pretty long, so for his spiel on the term "sifu" go to about 4:00 to 5:00 and listen to the last several minutes for his conclusion.
Ramsey can be pretty biased about TCMA at times, but not always. So he makes a lot of people mad. Guess I'm just a weirdo, but I like divergent opinions.
However what he is saying may be regional to Shanghai, there are a lot of regional differences in the Chinese language... also Shanghai is not Mandarin, it is Shanghainese (Shanghai dialect). No one in Beijing would call a cab driver shifu..... and in mandarin shifu does not mean sir. Sir in mandarin is (先生) Xiānshēng... and I have never heard a cab driver in Beijing called Xiānshēng either. So Ramsey may be correct in Shanghai, but he is wrong in Beijing. Also I doubt he is correct in Guangzhau or Hong Kong (Cantonese), and I might be there next summer so I'll see what they call cabdrivers. He is also not correct in Heilongjiang