"pinking" in the verb sense
1. tap, rap, knock, pink
make light, repeated taps on a surface
"he was tapping his fingers on the table impatiently"
2. pink, ping, knock
sound like a car engine that is firing too early
"the car pinged when I put in low-octane gasoline"
"The car pinked when the ignition was too far retarded"
3. pink
cut in a zigzag pattern with pinking shears, in sewing
Source: WordNet® (An amazing lexical database of English)
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