According to Daily Show correspondent Rob Cordry, Macaca is a small European country, whose inhabitants "never look back", they are so happy to leave.
Stewart: "Where exactly IS Macaca?"
Cordry: "Right next to YA PEE-PEE"
by Bill Peters August 17, 2006
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The second largest Genus of the order Primate. The largest being the homo Genus which includes the sapiens species (you and me).
Excuse me sir but my taxonomy is off a bit. Do you know the genus of that monkey over there?

Why yes...I belive it is of the genus Macaca.
by Brian F August 15, 2006
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An ethnic slur popularized by George Allen and aimed at Asian-Americans. This cheap racial epithet is, as Allen would say, based on "positive and constructive ideas."

SO "Welcome to America!"

www.youtube.com/watch?v=9G7gq7GQ71c
"Lets give a welcome to Macaca, here. Welcome to America and the real world of Virginia," said Senator Allen, of the only non-anglo person in the crowd watching his speech. The senator then began talking about the "war on terror."
by wtfer August 14, 2006
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A racial slur to refer to someone from India or with Indian ancestry
Yo, those macacas just shipped in some H.
by ramesh9876 January 28, 2011
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An epithet originally used in Nevada to describe dark-skinned people, especially popular in dude ranches and white supremacist neo-conferderate circles. Popularized by Sen. George Allen (R-VA).
"As long as I have some whites, I don't need the damned Macaca vote to win." -Sen. George Allen
by Francisx August 15, 2006
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A word whipped up to mean some kind of racial slur by spin doctors. Looking at the creation date of all UrbanDictionary entries, you can clearly see that nobody recognized the word as a racial slur until the spin doctors made it into following an off-the cuff statement by George Allen.

What's macaca? Well, it sounds similar to macaque, which is a species of monkey, but the word "macaca" didn't exist in any language until the Democrats and their media buddies created a definition for it.
by MurielArmand July 3, 2007
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