They have a habit of washing irregularly, are completely obsessed with anything and everything to do with anime and foolishly believe that all Japanese culture is as it is portrayed via an anime.
Often mix (badly pronounced) Japanese into regular English sentences when speaking to produce a 'dialect' of sorts that is not only difficult to understand but also makes them sound like the cheap tourist no one wants to be when on vacation.
Often are fans of yaoi, and think/talk about it non-stop, as they do other anime that have the misfortune of attracting a Weeaboo's attention.
Weeaboo: Koneecheewa! Have you lost your In you? (Inu = dog)
Normal person: Wha....?
"Those weeaboo kids think Japan is so great."
KEEP IN MIND: that a non-japanese person can like the culture, watch anime, speak the language and RESPECT THE CULTURE, while still keeping in touch with there own. Which keeps them from being a Weeaboo, japanophile, ect.
2. Someone obsessed beyond healthy levels with anime.
3. People who ruin activities for other people with overzealous references to said anime.
4. People so oblivious to reality they only care about anime.
5. An action worthy of getting one's ass beaten.
2. Americans claming to be "Otaku."
3. "Did you hear that kid? He won't shut up about how great Full Metal Alchemist is. Such a weeaboo."
Note: Anybody who watches some anime and reads manga are not weeaboos. Those who go over-broaded with their anime, hentai, and pocky obsession are.
OMG! I loooove Miyavi!!!
FYI - all you haters - I saved ALL these pictures!!!
...so hot, so fine, so sexy, so cute, so funny...*dies*
note that Weeaboo love over-using common japanese word/phrases, like kawaii, desu, and aishiteru accompanied by a exclamation mark.
Specifically a White American Anime, or Japanese culture fan, though the definition has been expanded in recent years to include anyone of Western culture(no matter the race) who get hard ons for Japanese culture.
Weeaboos often want to be Japanese and hate Western culture in favor of Japanese, which often most have never even really experience irl, just from Anime. It's more of a phenomenon in gen y due to the fact that they came up in the anime boom, kick started primarily by Toonami, and hyper Japanese gaming of the mid 90s with Playstation.
They are often Anime addicted, and spend tons of money(or their parents money) on anime merchandise, including cosplay, whole DVD boxsets(imported a lot of the times) plushes, and and bad anime video games. They are often pretentious about it(the hardcore ones at least) and think that American animation is crap, not mature, or only uses "crude" art, ignoring the fact that there is nothing mature or realistic about most anime.
Most of the guy weeaboos think they're some kind of romantics, often swooning over anime girls and having no grip on reality because they think anime love is real, and coin themselves as "nice guys" that can't get girls because they're often on the friend line.
Steve: Nah man, it's full of pretentious weeaboos who look down on you if you like dubbed anime.