vuzvuz n. a derogatory name for an Ashkenazic Jew. Also adj.; vusvus. Editorial Note: This term is usually used within the religion, especially by Sephardic Jews. The etymological information in the 1998 and 2005 citations is unverified. (source: Double-Tongued Dictionary)
Further reading
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“Vuzvuz” seems like an equivalent for “chakch-chakchim” – used as a derrogatory term for Mizrahim.
Remember Dudu Topaz in 1981?