A student who attends the beginning of class, but regularly takes off to "the bathroom" for ten-twenty minutes at a time, as if the backpack is going to do all the learning for him/her.
I always email my instructor at the last second to ask the most basic question because I'm a clueless backpack learner.
by barefootgirl March 7, 2011

"ring""ring"
mom "hello?"
muffled teacher " no billy that is wrong"
mom "damn it another backpack call and billy is getting answers wrong."
mom "hello?"
muffled teacher " no billy that is wrong"
mom "damn it another backpack call and billy is getting answers wrong."
by ankercod November 5, 2009

When you pull out during sex and cum on someone's back without telling them so they lay down and smear semen on their sheets.
Did you hear about Drew's girlfriend dumping him? Yeah man, he gave her a mayonnaise backpack and she ruined her sheets. 1,500 thread count, bruh. That's not cheap!
by Neo-Neo Zeon July 1, 2020

the friends of hot chics, who are not hot themselves,so they feel insecure and while your talking to her hot friend(s), they always come along and find a reason to take the hotter one away from you like theres something else better to do.
by projectmcl June 26, 2004

Backpack boys are a group of pubescent wannabe hype beasts. They wear large backpacks that are much too large for their teenage bodies. They travel in packs, and all mysteriously look alike, but they are NOT related. They never seem to talk, just walk around with their big backpacks. The term “backpack boys” was coined by Daisy Baierl in 2019.
by Hipandwiththekids November 6, 2019

by Nunyallsbiz April 18, 2013

Fetish wherein the object of one's desire wears a red backpack, specifically a randoseru. This fetish is frequently associated with lolicon, as the randoseru is typically worn by elementary school students.
Gosh those pedobears sure do come up with some wacky fetishes. Have you even heard of red backpack? Me neither.
by katats February 7, 2013
