noun
( -s )
Etymology: from gerund of pink (I) & pink (XII)
: the act or condition of one that pinks: as
a. : a method of decorating, cutting, or finishing cloth, leather, or paper with a pinking iron or pinking shears ; also : the work so done
b. Britain : detonation , knock
too much ignition advance leads to … pinking — B.C.MacDonald