In Japanese, the word means, literally, "outside person." In Japanese it's spelled 外人. It is often used as a contraction of sorts for gaikokujin ("outside-country person"), meaning forienger. In its contracted form it can be an insult, but in recent years has been watered down by widespread use in and out of Japan. In actual usage, a better definition would be "non-Japanese" since Japanese people will use it in reference to non-Japanese even when they themselves are the foriegners in a country other than Japan.
Gaijin in Japan stick out like sore thumbs because they're usually a full head taller than everyone else.
by k-d April 4, 2005
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1.From Japanese, literarily meaning " outsider". A derrogatory and ethnocentric term used to describe a foreigner in Japan that has round eyes. Other East Asians are not referred as " gaijin".

2.A Non-Japanese person with round eyes, anywhere in the world.
" why you dye your hair blonde? you want to be a gaijin??"
by gigantus March 11, 2006
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Japanese word meaning foreigner. In Japan genarally refer to westerners. It doesn't have insulting implication. It might be insensitive call foreigner gaijin as much as call foreigner foreigner.

= gaikokujin
kanojo wa gaijin to tukiatteiru.
She is dating with a foreigner.

by CalgaryFranky June 1, 2007
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In Japanese, this word means foreigner. Can be used outside of Japan, but unless the person you're talking to knows some Japanese, they may not know what you're on about.

Several meanings used include:

1. Usually used by wapanese people as an insult to mean "idiot" or "newbie". In that context, it literally means "one out of the group".

2. Used as a battle cry amoung foreigners in Japan to refer to their uniqueness (also see gaijin smash).
1. Wow, you failed that song on DDR didn't you? What a gaijin.

2. Yeah! There must be at least 6 gaijin in the kareoke booth! Woo!
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Japanese, means "foreigner", often used as a retort to people who use the term wordBaka/word.
I called that pasty white otaku a gaijin and made him cry!
by Invalid H. User April 24, 2003
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Insulting Japanese term that essentially means 'dirty barbarian'. While an insult coming from the mouth of a Japanese person, other foreigners in Japan will readily refer to themselves and others as Gaijin. Much like Blacks in America use the 'N' word to show unity, so do the foreigners in Japan.
"Hey, besides us, there's like 15 more gaijin at the club!"
by Jack L C October 17, 2005
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If you call someone "Wapanese" & mean it as an insult, they will call you a "gaijin" & mean it as an insult.

When used by non-citizens in Japan or anyone not in Japan, it's an insult meaning "uncultrued dumbass" rather than "foreigner."
1)"Some gaijin is going to be staying with us for awhile."

2)<as an insult> "He's such a gaijin! That imbread hick thinks his town is the whole world & that his way is the only way."
by Allaiyah June 25, 2004
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