an asian person who got a b in school
(asian kid gets b on math test)
Asian: Mom.... I got a B....
Mom: A B?! ARE YOU B-SIAN? NO. YOU'RE ASIAN AND YOU NEED TO ACT LIKE IT.
An Asian person who didn't get straight A's in school and ended up with one or more B's. Therefore, they are demoted to a B-sian.
Asian1: Dude, I just failed that AP Calc BC test. My grade is gonna drop to a B.
Asian2: Aww, dude. Your parents are going to use your college fund for new laptops if you become a B-sian!