TLDR: Older Brother
A little more detail if you like-
Onii can end with 3 different Japanese honourifics, -San, -Chan, or -Sama.
-San is the basic ending for the basic big bro.
-Chan is a more compassionate ending for Onii if you really love your big brother and feel emotionally attached to him greatly
-Sama is a bit of a formal ending for big brother, nothing too special.
A little more detail if you like-
Onii can end with 3 different Japanese honourifics, -San, -Chan, or -Sama.
-San is the basic ending for the basic big bro.
-Chan is a more compassionate ending for Onii if you really love your big brother and feel emotionally attached to him greatly
-Sama is a bit of a formal ending for big brother, nothing too special.
by Rywen March 10, 2015
Onii-Chan means "Big brother" in Japanese. Most people assume it's a mating call of some sort because of hentai but no that's just hentai. Lots of hentai has incest.
by RigsSaysGoodbye February 03, 2018
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.
Brother in Japanese. Used mostly by little girls or children. PLEASE do not make this sexual its gross.
by Dekus_hair_23 October 05, 2021
by definetlygoingtohell February 12, 2021