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?

by nmgirl February 22, 2011

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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?

by mastablasta5000 October 21, 2011

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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

by megsydmillard May 4, 2016

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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

by Richard Beater September 16, 2018

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Heavy Backpack

Used by a Eugene, typically the day after they snap. The backpack is heavy due to the AK.

Oh no, Eugene has a Heavy Backpack.

by Meememeem January 22, 2019

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Iraqi Backpack

When a female companion uses your scrotum as a condom over her tightly clenched fist before she inserts it in your rectum

Went to 7-11 for some smokes and bumped in to Tammy Lynn, bada bing bada boom 10 minutes later she’s giving me an Iraqi backpack! Really took me back to my youth.

by The original Balano July 16, 2019

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