Definition of "zip up" []

• To close with a zip fastener. (verb)
• (transitive or intransitive) To close as if with a zip fastener. (verb)
• To convert a computer file into a smaller package. (verb)

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• "He put a knuckle in the small of her back, causing a ripple of gooseflesh to zip up her spine, and nudged her forward, after the hostess."
• "The threesome’s rude reaction made me wonder if I had forgotten to zip up after my last visit to the urinal."