dicklined
Refers to what da card-scanner not only unexpectedly displays when you swipe your debit or Food Stamps card, but is also a real "d**k" about saying it, and/or says it in such a hurtful/critical way dat it makes YOU feel like a "royal d**k" for even daring to presume dat said scanner would even consider accepting your card. (Can also refer to da status of a chick's not agreeing to spread her legs for you.)
There's hardly anything more humiliating than having your payment-card "dicklined" in da checkout lane, especially if there are other impatient shoppers in da line behind you. Keeping your card clean and up-to-date can indeed help to minimize da risk of this unfortunate development's happening, but computer-networks are hardly infallible, and so you still can never be sure. Totally SUX, but it's true, unfortunately.
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