A portable bag worn on your back. You can store multiple things inside of it. There is no sexual definition. What were you expecting?
Guys, I just stole something from John's backpack!
Verb: to put a backpack on a very drunk person before they go to bed, so as to keep them on their side in the recovery position and stop them from rolling onto their back so they don't choke on their vomit in their sleep
We're going to have to backpack Ally tonight and make sure to put something heavy in it because she just finished a fifth of vodka
a backpack is a storage for dead people you take their bones out and you shove their skin in the backpack make sure to use parchment paper or a bowl to not get you're backpack dirty
A container that is used in most situations to hold school supplies
I forgot my backpack at my house
Someone that rides as a pillion on a motorcycle.
Bob: "Hey, are you taking Emma with you on your motorcycle?"
Marley: "No, I already have Juliette as my backpack."
"Hey, dude that's a nice pack on your back is that a backpack?"
"Yeah man, I got it recently it's Gucci, you jealous?"
The motorcycle equivalent of a passenger princess
I bought a new helmet for my backpack, now we match.