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.

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!

by SlopNChop May 19, 2016

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

by JonnyC March 15, 2005