1) A boy who is crazy about a girl but refuses to make any relationship public. He loves her one day, just wants to play xbox the next day, and the day after that she and her whole family are dead to him. He is inconsistant and irrational. Half the time he doesn't even make any sense. He also doesn't even know how to treat a girl right.
2) A boy who has the ability to be nice but just doesn't feel like it.
1) Girl - Why did you break up with your bf?
Other Girl - He was being a Brian.
2) I'm just so disappointed because my bf's a Brian. He just doesn't care enough to be good to me.