backpack barbie 

A backpack barbie is a motorcycle groupie, particularly a woman of model caliber who likes to ride passenger on motorbikes.

Hey bruh, I need me a backpack barbie for this upcoming motorcycle magazine photoshoot.

backpack barbie by The most Ballinest man ever. September 1, 2021

Bianchi Backpack 

A personal backpack for carries only who enjoy bottling and ksing FTW...

Kai carried Marino throughout his entire career in his famous "Bianchi Backpack"....

Bianchi Backpack by TheCarryOfJoom March 26, 2010

Overstuffed Backpack 

A term normally used as an inside joke to refer to a fat, ugly, douchie, male who has no idea you are refering to him.

(Right in front of the overstuffed)

Samantha: The overstuffed backpack gained some extra books today

Marissa: Yeah, some huge textbooks!

Overstuffed Backpack: WTF?

Overstuffed Backpack by nmgirl February 22, 2011

Open Backpack 

Meaning that you can see someone's butt crack or underwear slightly as a person is bending over similar to the zipper of a backpack being slightly open.

(Emily bends down to grab books) Me: Hey Emily you've got an open backpack
Emily: Did you notice my new Victoria's Secret thong?
Me: No I was just looking at your crack.
Emily: You're an asshole.
Me: LOL get it?

Open Backpack by mastablasta5000 October 21, 2011

Organic Backpacking 

Backpacking without planning and letting the world take you around. By doing this, you will experience and see things that doesn't happen often.

An organic backpacking trip in Europe.

Organic Backpacking by nonameafterall March 31, 2015

Australian Backpack 

A sex act in which a male is mounted by their partner in a "piggyback" style, wrapping their legs around the the front of the body, and masturbates the male with the arches of their feet (to completion).

My quads are exhausted after that Australian Backpack I got from Meghan last night

Australian Backpack by megsydmillard May 4, 2016

sheep backpack 

When you take your sheep on top of your roof and violently engage in coitus

Neighbor: hey what are you doing Tony. Tony: nothing just taking my sheep backpack for a test drive
neighbor: gross

sheep backpack by Richard Beater September 16, 2018