Frontwards backpack, when you stick your girlfriends legs over your shoulders and give her the goods.
by GreenUniforms June 17, 2020

by BettyWhiteWashed August 29, 2020

by DJB1GC December 10, 2019

Shorthand for perishable food left in non-climate controlled storage such as a backpack or trunk of a vehicle.
by TotallyNotDM June 9, 2020

A backpack barbie is a motorcycle groupie, particularly a woman of model caliber who likes to ride passenger on motorbikes.
by The most Ballinest man ever. September 1, 2021

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?
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?
by mastablasta5000 October 21, 2011

Neighbor: hey what are you doing Tony. Tony: nothing just taking my sheep backpack for a test drive
neighbor: gross
neighbor: gross
by Richard Beater September 16, 2018
