(n)origin: unknown. A disease of the upper thigh caused by the potent radiation of a common cell phone. If diagnosed early, it may not be fatal, but in most cases unfortunately it is a terminal illness. Some people believe that the illness can be reversed if the patient is told "bless your soul" repeatedly.
To avoid the harmful afffects of laughing thigh-cancer, shelby wisely keeps her cell phone away from her thighs.