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.
Don't be on 9 la. ( Don't be stupid )
Used in Hong Kong
Pronunciation: "on-gau" ("on" in English, "9" in Cantonese)
Meaning: stupid, thinking stupid
Citizen A: He's on9.
Citizen B: He's on99.
Pronounced "on gau" (The 9 is pronounced in Cantonese)
Cantonese slang used mainly by young Hong Kong Chinese. First originated on the Internet (isn't everything) but soon spread to everyday speech.
Originates from two words:
The first part "on" comes from "On ghuy" - a cantonese slang word meaning foolish.
The second part "9" comes from "gau" - a cantonese slang word meaning penis.
Also used as part of the phrase "on9 zai" meaning foolish man/boy.
Dude 2: Shut up, you on9 zai.