knuckle-buster
knuckle-buster · knuckle-busters
A credit card imprinterA credit card imprinter.
Meaning
2 senses(informal)A credit card imprinter.
(informal)A difficult piano piece.
Forms
plural: knuckle-busters| Singular | knuckle-buster |
|---|---|
| Plural | knuckle-busters |
regular
Synonyms
1 synonymszip-zap machine