Meaning of “Niki(ニキ)”, “Neki(ネキ)”, “Kaigai Niki(海外ニキ)”

“Niki(ニキ)” means bro and it’s an internet slang.
“Niki(ニキ)” is an abbreviation for “Aniki(兄貴:アニキ)” which means elder brother.

Even if you have no blood ties with the man, you can call the man “Aniki(兄貴)”, it means you feel “he is dependable (and also cool)”. But it sounds like Yakuza’s style just a bit.
Yakuza is Japanese mafia. In Yakuza family, they have a strong bond with each other like family, and they call elder member “Aniki(兄貴:アニキ)”.
So calling someone who has no blood ties “Aniki(兄貴:アニキ)” sounds like Yakuza’s style just a bit.
But you can use this Yakuza’s style, if you are not Yakuza.

On the other hand, “Niki(ニキ)” is an internet slang perfectly, nobody imagine Yakuza.
If someone call the man “Niki(ニキ)”, it means someone feel “The man is dependable and cool, and I respect you like my bro”
Most of time, we use it “someone’s name” + “Niki”.

“Neki(ネキ)” means sis, it’s an abbreviation for “Aneki(姉貴:アネキ)” which means elder sister.
“Aneki(姉貴:アネキ)” also sounds like Yakuza’s word just a bit, if calling someone who has no blood ties but “Neki(ネキ)” is an internet slang perfectly.
Basically we call the woman who is dependable “Aneki(姉貴:アネキ)”, but if we feel she is dependable extremely, sometimes we call her “Aniki(兄貴:アニキ)” not “Aneki(姉貴:アネキ)”.

“Kaigai Niki(海外ニキ)” is an also common internet slang.
“Kaigai(海外)” menas Foreign.
So “Kaigai Niki(海外ニキ)” means foreign bro!

Example Conversation

A: This video is also making a buzz in other countries.
B: That’s why there are a lot of English comment.
A: I like this comment, Kaigai Niki suko!

A: この動画海外でもバズってるらしいぜ
B: だからコメ欄に英語多いのか
A: このコメうける、海外ニキすこ

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