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Verb: spiff up
Usage: N. Amer, informal
  1. Make neat, smart, or trim
    "spiff up your house for Spring";
    - spruce up, spruce, titivate, tittivate [rare], smarten up, slick up [N. Amer], smarten

Derived forms: spiffed up, spiffs up, spiffing up

Type of: beautify, embellish, fancify, prettify