Is basically a very nasty word for defining western people who like japanese stuff such as anime, decora/lolita fashion and J-Pop.
And they are scrutinized for liking hello kitty and pokemon although most young girls have grown up with the merchandise from both brands.
-'Hey what's your style?'
-'Oh it's decora...it's from japan!'
-'OMG you're so wapanese! that's so lame!'