onii chan mondays 

Onii chan mondays is a special holiday in the onii chan world. It celebrates everything about onii chans. Onii chan mondays have foods such as onii sans.

Did you know that ur mom farted very nicely during onii chan mondays? uwu owo uwu

onii chan mondays by daddybunkins March 2, 2022

Onii-chan 

Onee-chan is Japanese for older brother.

"Good morning, Onii-chan"

Onii-chan by Odelia November 25, 2007

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

Onii chan 

Your cute big brother

"Onii chan yamate kudasai!"

Onii chan by ~Ewiot~ June 11, 2021

Onii-chan 

When a anime girl calls her older brother "onii-chan" it means get ready for insest.

Anime girl-"onii-chan~"
*1 day later* *INSEST* Anime girl- *moAnS*

Onii-chan by SeNpAi~~~~ August 11, 2019

Onii-chanable 

Construction: Combination of the Words, Onii-chan(Big Brother)And Able(having the means or opportunity to be something.)

When someone can be a potential Big Brother type

but due to usage in the Anime Industry and in Otaku Culture, it is mostly known as the term for"Elder Brother"

"That man is responsible"
" Yeah, Totally Onii-chanable"
"What?"
"Onii-chanable."
"Wtf are you talking about jesse"

Onii-chanable by Xer Ralda December 27, 2021

onii-kun

Someone bigger than you calling you "Little kid" or to girls "Little girl".

Hey onii-kun, what did your parents say when you said you had a new brother? "Make sure he's not gay?"

onii-kun by urmumgeylol629 May 17, 2018