backpack riding 

Great game made up by 2 kids in 8th grade. One person takes his backpack off and runs across the hallway floor while dragging the backpack on the ground. The other person runs behind him and jumps onto the backpack while it's moving. While the person is in front dragging the backpack, the person on the backpack has to stay on as long as he can.

Backpack riding is a great game to play those 5 minutes you get between classes in the hallway.

backpack riding by Chris January 11, 2005

backtracker

A Fart, strong enough, and pungent enough, to leave a trail up ones back, when escaping.

Mildred, Im afraid you shall have to wash my sunday shirt, I dined with Edward last night, on Guinness, and steak. Im afraid I suffered a "Backtracker"

backtracker by Paul Hunter June 13, 2007

Day 5 Backpack 

Your backpack on the school day when all of your classes meet.

Damn this day 5 backpack is so god damned heavy.

Day 5 Backpack by APple36328394 June 9, 2009

Backpack fetish 

When someone wears a backpack for a long time and hardly ever takes it off

Did you see him wearing his back pack?

Yeah didn't you hear? He has a backpack fetish

Backpack fetish by Welperoni June 2, 2018

Boston backpack 

(noun) An improvised explosive device.

Ban all the guns you want, but good luck spotting a Boston backpack in time...

Boston backpack by Tamerlan April 28, 2013

Backpack 

Someone who has muscles on their back (naturally or by flexing).

The look of having triceps and biceps on your back muscles.

girl 1: whoooa, check out that hottie!
girl 2: Daaaang gurl, that boy's got a kickass backpack

boy 1: Yo, check out my backpack!
girl 1: sigh, i wish my boyfriend carried a backpack like yours...

Backpack by RRELLO February 18, 2010

Backpack 

Eugene's tool for carrying his AK-47 while shooting up the local school.

When Eugene reaches into his backpack, you know it's time to run.

Backpack by TheCubesAreWarlords April 11, 2017