18-C 

Used in America's Army, a first-person shooter game: A special forces soldier who uses a M4A1 SOPMOD weapon. A selection for your weapon (M4A1 SOPMOD).

Man, I want that 18-C slot! You n00b, give it to me!

18-C by Urban Dictionary October 25, 2004

18 Cubed 

Drinking 18 beers, smoking 18 cigarettes and golfing 18 holes at a regulation golf course. Usually for the golfer who is there more for the party than the actual golf. It's an amazing feat, accomplished by few.

I pulled off 18 Cubed and immediately retired from golf.

18 Cubed by Fitty4ex May 22, 2008

18 cm 

18 cm is the perfect dick size. If you have 18 cm you are a God. If you have the chance to have sex with a boy who has 18cm, take it.

My boyfriends dick is 18 cm long. I love it.

18 cm by Sokka0815 May 4, 2023

18 credits

Usually the maximum amount of credits offered at a university. Leads to physical and social death.

"I'm taking 18 credits this semester."

"good luck with that. Don't die."

18 credits by amber0318 October 27, 2010

Jack 18 Call Me The Rizzard Of Oz 

Jack 18, Call me the Rizzard of oz, let me work my magic
500k+ subs on yt, side hobby
Is the tinder profile for a famous YouTuber called Chezitoo

Person 1: have you seen Jack 18 call me the Rizzard of oz?

Person 2: oh pointcrow?

Jack 18 Call Me The Rizzard Of Oz by Chezitoes August 28, 2024

18 naked cowboys 

"In the showers, in the fields.. Anywhere in Ram Ranch"

"There are 18 naked cowboys in the city!"

18 naked cowboys by Definitions for people October 22, 2018

18 to chill, 21 to spill

You have to be at least 18 years old in order to enter this night club, and you may buy an alcoholic beverage if you are 21 or older.

Official New Year's party. Doors open at 10pm. Men $10, ladies $8. 18 to chill, 21 to spill.

18 to chill, 21 to spill by click here January 22, 2009