backpack

Guy code for referring to a girl under the age of eighteen. Can be either mentioned verbally or simply shown by making the motion of tugging on backpack straps on your shoulder.

That girl is hot, too bad she's a backpack.

by G. Sherman August 22, 2003

BackPack sex

Having sex with a backpack buy opening the zipper and sticking your junk in that compartment

"Dude, did you bang that chick?"
"Nah man, I got really drunk and wound up having backpack sex!"

by The Reactor October 1, 2009

Backpack pull

The act of taking a plastic handle of only the finest vodka (ie. Heritage) to class inside of your backpack and taking handle pulls throughout the lecture with the plastic handle still inside your bag.

Jen:"Why do you have a handle of Heritage in your back pack?"
Steven:"Obviously to take backpack pulls to get through Fygenson's lecture"

by classless teenager December 9, 2010

Backjack

The act of jacking off your boyfriend whist he is sat behind you as you are typing this onto his laptop at the same time. During this he is sitting on his Nintendo DS playing Pokemon.

Example: having a laptop on your knee; sitting on the end of the bed; penis in hand! There you have, a backjack!

by Carrots. June 29, 2014

backback

A very versatile word, used to describe any number of sexual acts.

1. Sex without a condom.
2. Sex between 2 men.
3. Random gibberish, implying sexual acts.

1. May as well go backback from now on!
2. Do you want to backpack to Brokeback and maybe backback?
3. backbackbackbackbackbackback

by inspectr88 May 23, 2008

back sack

an unfourtunate birth defect where instead of having a nutsack next to your tallywacker, you have one on your back

I fell off my bike and my back sack exploded

by ice dragon April 4, 2009

Backpacking

slang for a gay males having sex...anal sex...How one would be behind the other person with his arms and hands over his shoulder thereby being like on wearing a backpack.

Like scissoring for Lesbians.

Aw...those guys look like they are going backpacking!

by PSBforver February 5, 2010