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"popping" is also used as a crossword clue. If that's what you saw, the answer is often crackly (7 letters).
Definitions
a sharp explosive sound as from a gunshot or drawing a cork
Used in a sentence
“Poppings at various points along the spine may be noted, which may or may not have significance.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Making sharp sounds”7 letters
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