back 40

a rural reference to the "40 acres behind the barn"

When George Bush returns to Crawford, Miss Laura will ask him to clear the brush on the back 40.

back 40 by Gene Bob October 22, 2004

plowin the back 40 

When vigorous anal sex is performed and sometimes causes the recipient to bleed.

Garrett : What's up with the blood stain on Keirsten's pants?
Jim : I guess Chad was at her house again last night plowin the back 40!

plowin the back 40 by SlopNChop May 19, 2016

Australian back 40

Also known as a Aussie back 40. The act of placing a dip in your asshole and getting an unfiltered nicotine high.

Tim: hey nick, wanna dip?
Nick: only if I can do the ol Aussie back 40!

Tim you’re such a badass!
Nick: only BAMF’s do Australian back 40’s, if you don’t your a bitch!!!

Australian back 40 by Term-inator March 9, 2026

Throw back a 40 

To drink some 40's and shit.

Man it's friday night, and im not wasted, im gonna throw back some 40's

Throw back a 40 by JonnyC March 15, 2005