meaningslang
I have just watched the "Jungle Fever 1991" (http://en.wikipedia.org/wiki/Jungle_Fever) film which tell a story a white woman dates a black man. So,
Does "Jungle Fever" mean a white woman dates a black man? (http://www.urbandictionary.com/define.php?term=jungle+fever)
If it does, then why they say "Jungle Fever"?
I believe you are thinking of Q-tip. The passage means the guy was tall and very white by comparison with his companions.
You can read all about it:
Reader's digest did an article series back in 1970 called "I am Joe's Body" One of the installments in the series was titled "I am Joe's Man Gland" Only version I can find on line drops the subsection titles, and merely lists Joe's testis:
I am Joe's left testis. Compared to other glands, I am not bad- looking at all: a glistening, pink-white oval. I weigh four grams and am four centimeters long, two centimeters at my greatest diameter. My function is dual: to manufacture those creators of life, the sperm cells; and to produce the hormone of maleness, testosterone. This chemical assists in construction of muscle, bone and other tissues. It helps shape Joe's mental attitudes as well as his body. But for it, Joe would be soft, flabby, beardless, apathetic.
The title, its derivatives, and the attitudes expressed in the piece became a bit of a pre-internet meme.
Best Answer
Jungle Fever originally meant malaria, according to The American Heritage Dictionary, Collins, and others.
It's use with this meaning peaked between 1820 and 1860, according to Google ngrams.
During that period, stories and novels regarding missionary travails in foreign lands were popular. Some were erotic or about "forbidden love". See for example The Missionary.
So Jungle Fever also carried a meaning of forbidden love in the sub-text. This has been reinterpreted and made more explicit in modern times, as both your movie link and Urban Dictionary link show.