Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.
on lun 7 9
on9 on stetoid. In colloquial Hong Kong Cantonese, on9 means fucking stupid, while 'on' means stupid and '9' has the same pronunciation as 'gau', meaning dick. on9, therefore, means fucking stupid (adj) or fucking idiot (n). 'on lun 7 9' mean on9 to the extreme: lun, 7, 9 all means dick in profanity in Cantonese in Hong Kong. In general, the more variations of the dick you can cram into describing the same event, in this case 'on' (stupid), the more amplified and emphasized is the meaning.
roommate1: hey what don't you turn down the volume, i wanna get some shit done for midterm tomorrow
roommate2: what don't you go bang your fucking head on the door. (you are) on lun 7 9! (adj)
Upon seeing a mainlander lining up outside the Aston Martin store for hours in the rain to get a new ride so that he can brandish in front of her fellow mainlandish friends back in the mainland, a local hk goes -
random_guy: you see that on lun 7 9 over there? who with a sane mind would line up for an Aston Marin? it hurts both the legs and the wallet. If i'm getting a AM, i'll make the sales treat me like i'm James Bond
roommate2: what don't you go bang your fucking head on the door. (you are) on lun 7 9! (adj)
Upon seeing a mainlander lining up outside the Aston Martin store for hours in the rain to get a new ride so that he can brandish in front of her fellow mainlandish friends back in the mainland, a local hk goes -
random_guy: you see that on lun 7 9 over there? who with a sane mind would line up for an Aston Marin? it hurts both the legs and the wallet. If i'm getting a AM, i'll make the sales treat me like i'm James Bond
on lun 7 9 by No_Hands March 3, 2011
Related Words
on lun 79 • ON Lun 99 Sic Bun Chau • on fleek • on • on it • On God • on jah • on point • on deck • on the rag
More from Urban Dictionary
Bunhead
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
trucker's tan
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
trucker's tan by population361 May 30, 2006
Word of the Day on October 5, 2026
kidulting
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
Boffin
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
Pee Calculus
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026