Weeaboo

Someone who is overly obsessed with the Japanese culture to the point of irritation / annoyance. Although this was initially used as a negative term, some people are self-proclaimed weeaboos, who don't mind that they are weeaboo. The term 'weeaboo' is often shortened to 'weeb'. There is also a clear difference between someone who simply is interested or likes the Japanese culture, and a full out weeb. You wanna learn Japanese? Go for it. You wanna visit Japan? Sure. You like anime and manga? That's great! But it becomes an issue if, I dunno, you use Japanese honorifics after everyone's name (-san, -kun, -chan, etc.), or if you wear a Naruto outfit and Naruto run everywhere, or if you refer to yourself as (name)-です（desu). But hey, you do you.