Yangmo is a slur used to describe Asians in a derogatory way. Generic term representing any Asian group without having to identify country of origin.
The word Yangmo is a racial slur that has been used historically to degrade and dehumanize asians. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to asians. If you are unsure about whether or not it is appropriate to use the word Yangmo, it is best to err on the side of caution and avoid using it in any situation.