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.
That guy over there is a total weeaboo.
-damn that dude is really an weeaboo
-weeaboos are humans too...
-im not some weeaboo
Most people would say that a weeaboo is a person who loves anime or Japan and only anime or Japan. That's not entirely true.
A weeaboo is someone who is obsessed with a culture that isn't their own. That's basically all weeaboos are.
Ethan: Arf is a half-gay, Hamilton obsessed, French Weeaboo.
Arf: Yes, that is a fact.
See- Furry
Also see- Kpop stan
Furries and Kpop stans have a propensity to emulate Japanese culture. What a bunch of weeaboos they are.
That one kid in school who dresses up as anime characters with the mask and the ninja headband and runs with his hands back
That weeaboo is so weird, he’ll never get laid
Someone who watches anime and feminist.
Dude 1: Hey, i like to watch Cory in the House, its my favourite anime
Dude 2: Dude, that is not an anime. ANI mes are japanese.
Dude 1: Stfu dude, dont be such a weeaboo, Cory is black.