18s

18 inch subs, commonly placed in a car's trunk for that extra BUMP BUMP

"18s in tha trunk, didn't see no wires, then i heard BOOM from the amplifiers"

by WIz Master C July 02, 2003

18+

A rule often seen on the internet that nobody follows.

Admin: R page is 18+??//!!!!11 We dnt want ur parents 2 sue us!!!11111111
17 and 1/2 year old: lol fuck da police

by thisplacesucksass April 27, 2014

18

The age where an American can:
1. Legally buy pornography
2. Legally buy cigarettes
3. Legally gamble in Indian Casinos
4. Legally be concidered an adult
5. Be tried as an adult in a court of law
6. Be drafted for a war they don't believe in
... but still cannot buy alcohol.

Billy: Wow! I turned 18! I'm going to buy cigarettes and gamble in a shoddy Indian casino!
Joey: Wow! I turned 21! I'm going to buy vodka and gamble in a real casino!
Billy: ... damn country.

by Matt May 03, 2006

18 in 18

The practice of ingesting a beer per hole on a regulation golf course. 18 beers in 18 holes. It usually results in uncoordinated golf and dismissal from the Golf Course. The destroying of Golf carts, clubs and apparel is also a typical result.

I pulled off 18 in 18 last week and I'm still hung over.

by Fitty4ex May 22, 2008

18

You're old enough to know better, but young enough to not care

Mom-Act your age not your shoe size, you're 18 for cryin out loud!
Kid-Make me!

by Kay1708 February 16, 2009

18

The age you're waiting for your girlfriend to turn.

"Broo Jessica's birthday is coming up right? She's turning 18?"

"Yeah man finally, we've been dating for 3 years now, it's about time I lose my virginity, I'm god damn 23 years old."

Jessica to her best friend: "When do you think I should tell him that I want to wait until marriage?"

by DannyDimes December 10, 2020

18

The age at which your dick stops growing

Bob : “He’s 18 and only has two inches”

Jerry : “Sucks for him”

by Urboy666 January 03, 2021