it decribes bordeom or not caring whotsoever. it can also decribe in both real life and the wierd tv show spongebob squarpants saying somthing worthless
hey sup bla last night i bla and also bla the bla bla bla bla (who cares)0_o
Abbreviation for Boys Lover Anonymous, typically used for girls(or I guess it could be guys too) who can't stop loving boy's no matter how stupid they are-ALL THE TIME
Person 1: Hey, where's insert name?
Person 2: Oh, BLA. They can't stop loving boys.