backsack

The part of a man no one should ever have to see. More specifically, the back of a man's scrotum.

Dude, when I was in the locker room today I totally saw some old guy's wrinkly backsack.

by JohnC7 February 16, 2008

so much backpacks

A common expression that means one will achieve the highest levels of victory and will be praised as great by others.

He's gonna get so much backpacks with that new hat.

by njrunner22 May 11, 2008

backrack

When the fat on a woman's back resembles a pair of breasts.

when stuffed into a tight bra, or overflowing out of a low cut dress...

by floyd January 2, 2004

Backsack

to view testicles from behind usually caught on camera upon showing your friends your arse and leaning a little too far forward

On reviweing holiday pics:
"that was when you got your arse out, whats that dark patch between your legs?"
"backsack"

by Dr Diddy January 21, 2009

backjack

The act of multiple men sodomising eachother in a human train. Just before ejaculating each one pulls out and blows their load all over the back of the guy in front shouting "twenty-one !"

Damien the sick fuck went out and played backjack with 5 guys he met at a gay bar.

by DamienN July 14, 2006

Canadian Backjack

During Sexual Intercourse, A woman sticks her one of her tits into the mans asshole, and reaches around and jacks you off at the same time.

Man, I jus got Canadian Backjacked.

by Dillon Coolman December 11, 2011

Canadian Backjack

When a woman sticks one of her tits in the mans ass hole and reaches around and jacks you off from behind.

I jus got Canadian Backjacked

by D-speed December 12, 2011