A sock or a piece of clothing kept by an adolescent male's (or any male) bed to be used as a receptacle when he jerks off. Mom then finds it hardened in the laundry and is relieved to find out her son is a normal teenage boy.
Bobby had to jerk off into his own hand because his mother found his snapsock and put it in the laundry.
by RehpotsirhC December 12, 2013