1) A band or artist that is insanely good, but that no one knows about. They may have 1 or 2 songs on youtube, and the only place you can buy their music is on itunes.
2) A song or mixtape from a famous band or artist that you can only find through random downloads and links.
Hazen: Hey wait, have you ever heard of the Spokes?
Lee: No man, they must be backpocket.
Hazen: *shakes head in disappointment* that drags dude. They're too good.
When a potential somebody puts you in their backpocket for a rainy day - you become their backpocket bitch. You know you’re a backpocket bitch when you’re left hanging for days on end and mostly get texts in the evening.
Similar to backpocket girl
Girl: I’m going to make him my backpocket bitch before he makes me his backpocket bitch
Backpocket knowledge consists of useless facts that serve no purpose but are still interesting to know nonetheless
Group of smart people: *having an intense conversation about the universe*
Bob: Leaves are green because they have chlorophyll.
Group: Thank you bob for sharing your backpocket knowledge with us.