40 

1. The number between 39 and 41
2. The age that most consider the begnning of being "middle aged"

I got a 40 on the SAT's!!!

40 by Kballa July 21, 2008

40 

abbreviation for the word/handle forte, an infamous hacker from the early 90s.

other abbreviations used: 4d, 4te, fourty.

yo forte, write me a worm in c.

40 by jon June 6, 2004

40 

40 stands for .40 caliber handgun.

"I look at your gang with my 40 and I aim" - Tay-K — Megaman

40 by roawruwu July 31, 2018

40 

Glock ( gun )

Put the 40 in her mouth and make her gag make her throw up

40 by litttbitch December 3, 2020

40 

A bottle containing 40 fluid ounces of malt liquor beer.

But when it's all said and done, I'll be forty / Before I know it with a 40 on the porch tellin' stories

40 by Delbosco October 10, 2021

40 

A 40 is code for a vape in Aussie Teen Slang.

Imma buy another 40 tonight

40 by Eshay Brahh February 6, 2022

40 

I'm not 40. I'm 33.

Hym "But you know what? I looked up my name and there was another me running around and HE was 40. So I don't know if my identity has been stolen in the conventional sense as well but yeah... I survived longer then Jesus! I'm like the ultimate Jesus."

40 by Hym Iam February 25, 2025