What's on your mug?

Guy code for referring to a girl under the age of eighteen. Can be either mentioned verbally or simply shown by making the motion of tugging on backpack straps on your shoulder.

That girl is hot, too bad she's a backpack.

By G. Sherman

placing a backpack upside down on a butterface and zipping it tight before you go to town.

Geoff: Check out that chick's tits. Her face is jacked though. Kumar: I'd backpack the hell out of her.

By hoboscratch

To think A girl is hot and/or delicious. Comes from the show Dora the explorer when the backpack says, "Yum yum yum, Delicious." Instead of saying "That girl is hot." Just say backpack in order to let your freinds know that you have spotted a hot girl without letting the girl know that you are talking about.

1) That girl walking down the Street is a backpack. 2) Do you remember that backpack we saw yesterday? 3) I hate stuck up backpacks.

By Frankie Bueno

backpack is a replacement for any sexual body part.

"heyyy papi, i have fat fingers, just like my... backpack"

By bbc brotha

When a guy is doing a fat chick in the stink and sticks sex toys in her fat rolls, acting as a backpack.

Jason: "Last night i totally backpacked Jenna." Mike: "Yeeeeee!!" Us: "WTF."

By dont faaackin worry about it