Ie; a girl in a mini skit, a low cut top and/or heels/A girl waiting at a traffic light eating a lollipop. A girl bending over to pick up a coin. A girl at a club making out with another chick.
A guy doing push-ups at the gym. Guys at the office etc...
Matt: Hell yeah...she deep throated that shit!*...that's going in my spank bank.
Amber: ewe...you guys are sick!
*i.e: tittys and ass
B: "yea i'll withdraw one later."
A: "Bro that girl over there got some big big tittys"
B: "Yea dude i made a deposit into the spank bank like 8 miniutes ago."
Zac: Did you put that image in the spank bank?
Billy:Yeah dude I'm gonna rub one out later to it via spank bank.
1. A collection of visuals that one stores in their memory for future self satisfying purposes (i.e. nipslips, cleavage, thongs)
2. The mental file of all the times one has had sex.
2. Last night I had sex with Lisa, another deposit in the spank bank.