bunny punch
n.— «This is what’s known as a pattern punch but often described as a bunny punch or just “bunny.” These are very heavy, solid cast iron with a round 3/4″ steel die.» —“Bunny punch” by Kathleen Fasanella Fashion-Incubator (Las Cruces, New Mexico) Sept. 15, 2006. (source: Double-Tongued Dictionary)
Further reading
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Brian in San Antonio, Texas, wonders about the origin of the pinking in the term pinking shears. Such shears cut an even, zigzag pattern that keeps cloth from fraying at the edges. Pinking likely comes from French piquer, meaning to...