crawlin' up the wall
laying on your back with your legs against the wall, the action of masturbation with the result of shooting semen into your face, aka as a "self money-shot"
guy: hey, why didn't you answer your phone last night?
friend: well my parents had a long talk with me about what it means when parents catch their sons crawlin' up the wall...
friend: well my parents had a long talk with me about what it means when parents catch their sons crawlin' up the wall...