A gangster in school or other community, greatly respected or feared by other people. Makes a lot of trouble to teachers and such.
Milla: What did The Bacnhou do this time? :o
Makke: She broke all the windows from chemistry class room.. With a baseball bat.. She was pissed of by..
(Banchou comes by)
Milla: ..Ba-ba-banchou..I mean Mary, we-we-we weren't talking shit about you behind you'r back or anything..(Augh!)
Mary The Banchou: Don't call me banchou in public like this..