caughther PIN

Da four-digit security-code for your debit card dat you gave a female acquaintance "for emergency use only", and so you were able to be notified if she used it for non-essentials, since she's da only other one who knew said "magic" button-pressing sequence.

My girlfriend used my bank card to purchase a replacement COTTER PIN for a piece of basic household equipment, so this was indeed a necessary item; it wasn't a "caughther PIN" instance..