2. An infectuous tropical disease carried by mosquitoes.
And I should know.
Calm down man, you've got a dose of yellow fever.
(a) A sexual obsession towards females of Asian descent.
(b) An obsession towards Asian media and entertainment, primarily anime, hentai, manga, and other Japanese media.
(c) A sudden urge to imitate anything from Asia. For instance, learning Japanese and eating sushi just for the sheer sake of trying to be "Asian".
(d) Thinking that one knows more about Japan than the Japanese themselves, despite never setting foot in that country or at lest reading about it.
2) When a person of non-Asian ethnicity has strong feelings and/or urges of an Asian person of the opposite gender. Usually these urges are sexual, but not always. Wasn't too widely known until the release of Harold and Kumar Go to White Castle.
2) Little Billy went to a club in Chinatown and now has a sudden case of yellow fever.
Friend: are you kidding me? She’s missing half her teeth and is built like a 12 year old boy! Plus she barely speaks English! man! You’ve got yellow fever!
Calm down Douglas, you have a major case of yellow fever!