Onii-chan 

A strikingly sexy male friend, who all girls fawn over. A word used in replacement for the male friend's name whom you drool over so dearly. In Japanese, Onii-chan means older brother, and is a title of respect and in some cases, resentment. Onii-chan is a word commonly used during weaboos climaxing over hot characters in their favourite anime

Hands off! Lincoln is my Onii-chan!

Onii-chan by Lord Onii March 10, 2015

Onii-chan 

The Japanese word for "fuck-buddy" most commonly used in anime.

"Onii-chan! Close your eyes and don't look ;)"

Onii-chan by Secretsneverdie December 16, 2017

Onii-Chan 

Means sister or brother.

Kotomi: Nuu Onii-Chan

Onii-Chan by corakc November 11, 2009

Onii-chan 

A word you usually use in bed ;)

Onii-chan...faster ;)

Onii-chan by PlateOfTakoyaki January 22, 2021

Onii-Chan 

Alabaman incest but Japanese

At least onii-chan costs 25 dollars, Sike its free

Onii-Chan by Lejiboy May 13, 2022

Onii Chan 

Means big brother in japanese and not used in any type of sexual or romantic way. It just means big brother in japanese.....chan here refers to the formal greeting that any kind of people use it to refer it to the elders where onii means big so in total it refers to big elder or big brother.

Onii chan is working in a big place nowadays.

Onii Chan by anonymous August 22, 2022

Onii- Chan 

To most normal people it means "brother" but...
if you're a nasty, it means "fuck buddy"

"Good morning Onii~ Chan"
Ara Ara~ Onii- Chan, you're so hard"

Onii- Chan by definetlygoingtohell February 11, 2021