Oni-chan

A way to say, “brother”.

Often used as, “Yamate oni-chan!”

by Bung33cum May 23, 2021

Oni Chan

When you love your brother so much!

'Ohayo, oni chan~'

by yourlocalcatgirluwu May 3, 2022

oni chan

basically stepbro

omg oni chan nooo

by youwantpen March 9, 2021

oni-baba

demon granny

person one: wanna chill?
Person two: nahh i'm to busy killing helping my grandma make spleen cookies with my oni-baba

by rachirachipoopoo May 7, 2009

Oni Viper

The slave of Oni Savior.

I’m Oni Viper, I’ll do anything Oni Savior says.

by Oni Savior April 18, 2022

ETA ONIS

ETA ONIS (or etaonis) is an acronym. It's the order of letters in the English language from most to least used in a word. Useful when cracking polyalphabetic cyphers.

ETA ONIS is especially helpful when deciphering polyalphabetic codes! Even Macallan used them!

by aBronyPlays February 5, 2021

oni-san

Japanese. Literal Meaning: "Mr. Devil."
Usually used my a male as a means of describing himself as a daredevil, or as cunning, esp. with women.

Oni-san, kocchi de! {i am} Mr. Devil over here!

by Tengu April 1, 2005