baku literally is explosionsince the bakugan pops open on a metal gate card, and exaggeration would be that it explodes open, WOW!when a girl has huge boobs in Japan they say Bakunyu = explosively big boobsThey also have a saying that goes (name of thing) is Explosively popular which is like saying super or mega popular.so you can say that Bakugan in the USA is explosively popular.btw, jap is a racial slur, so don't use it unless you want to be seen as ignorant and or a racist.