on9 

It is short term of online

Or
Feels very happy, short term as on cloud nine Or
Word for appreciation, which is upper than 1-9, and greater than them, for appreciating people who done very good advancement

When he on9s, he feel on9, and do a very on9 thing

on9 by PolyMoster April 22, 2022

on9 

Short term for on cloud nine in Cantonese, which means extremely happy and delightful, and it's positive.

After we seen he entered the girls' TOLIET of the elementary school, we can see that he is so on9

on9 by PolyMoster September 26, 2022

On9 jai 

This word is commonly used in Hong Kong.
It means the person is very stupid, doing childish and stupid things, or saying something that is nonsense.

Bus Chun is an on9 jai

On9 jai by The invisible guy December 31, 2019

on9 Sor Hai 

A person who studies in Hk LSC. 2022-2023 currently Form 1. always shout and scream in class. always get hit by classmate. always use a accent that sounds like british but not british, a sor hai accent.

this name was created by anson wan.

e.g. on9 Sor Hai, you 收皮啦！You so ON9. f you BEACH.

on9 Sor Hai by puff dumbodore November 9, 2022

on 9

A foul language term in Cantonese , mainly used in Hong Kong.

When someone did something stupid or doing something silly. We will usually call them " on 9 " - Which means " stupid penis " in english.

the number " 9 " is from the pronouciation of " penis " in Cantonese.

An excellent word for saying this to people in Hong Kong.

Mr.Tung is an on 9. ( Mr.Tung is a stupid penis )
Don't be on 9 la. ( Don't be stupid )

on 9 by Scottie August 25, 2004

Keep on 9

To Keep on 9 means to be aware at all times without getting distracted.
By telling someone to keep on 9 is usually a threat made by posing gang members to inform you that you are in danger.

person 1 : Aye suuwhoop watchu doin in my area
person 2 : What’s it to you slob

person 1 : Your ass better keep on 9 cause im about to pump you full of lead

Keep on 9 by ds.at February 5, 2020

on99 

so fucking stupid
chinese pronunciation

mum: dont go to bball
me: on99

on99 by urlifehk June 29, 2003