blank call

noun
🔊/ˌblæŋk ˈkɔːl/
🔊/ˌblæŋk ˈkɔːl/
(Indian English)
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  1. a phone call made by a person who does not give their name and who wants to threaten, annoy or worry somebody(威胁或骚扰的)匿名电话