mainlanders are people from mainland part of china (basically
the communist part) They are considered by their non mainland (hong kong and taiwan or non-communist) chinese
counterparts to be annoying, vile and most of all
disgusting (what do you expect when they are living through communism?) some modern tinkers are now considering to use the term mainlanders to describe a type of sub humanism(because where ever they go they seem to show very inhumane acts)..... like when the nazi described romanians as gypsies.