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Credit Card Glossary

Credit Card Glossary: Terms and Definitions

Confused by credit card terms? CreditCards.com's glossary of credit card definitions will help. From account holder to Regulation Z, we have defined the most-common and most-confusing credit card terms.

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Knuckle-buster
A knuckle-buster is a manual credit card impression machine that creates multiple receipts by sliding a handle to record the raised numbers on the front of a credit card onto carbon-paper packet copies. The credit card is placed on the bottom of the machine and the carbon receipts on top. The user then slides the handle across the machine and back to make the impression. Also called a zip-zap machine.