the part of a person's memory, especially male, where memories of naked ex-girlfriends, pornos, your friend's mom, hot teachers, real life upskirts, downblouses and nipple slips, the girl next door, flexible girls, hot lesbian action, and other material, are stored for the purposes of masturbation.
setting: CPR classroom
student1: Yo,did you see how the teacher used her fingers to get the obstruction out of the manequin's mouth?
. She must be a lesbian, or something.
student1: She's going into the crank bank.