I found some references that say “on9仔” is a Cantonese slang word that means “stupid” or “foolish”
把能當歌2023-05-24 09:48:47
retard
威威先生2023-05-24 09:49:35
You
瘦宗靜尋2023-05-24 09:50:27
Imbecile or retard.
狂風掃浪蝶2023-05-24 09:50:40
iamchimagun
周七一日見2023-05-24 09:53:49
有次打機見到鬼仔殺完人之後 講 i am nt not hack
我都即時打左句on9
佢問我what is on9
與湖汕臭有關的2023-05-24 09:55:11
tard
retard
dumbfuck
shit for brains
braindead
烏冬季節2023-05-24 09:59:09
Cunt
溫暖的獅蚶2023-05-24 10:02:12
Online buddy
許軼隻狗2023-05-24 12:21:03
dumbass
狗公格2023-05-24 12:47:46
Please Don't Go Johnny
麻瓜先生2023-05-24 12:50:35
cloud nine
打尻棒法洪柒公公2023-05-24 13:08:06
Fucking Chinese
琴晚打老虎2023-05-24 13:23:30
You are correct. "on9仔" is a Cantonese slang term that refers to someone who behaves foolishly or naively, particularly in the context of online interactions. It can be roughly translated to "online kid" or "internet fool" in English. It is often used to describe individuals who lack common sense or exhibit foolish behavior online.