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Verb: whoop it up
  1. Celebrate noisily, often indulging in drinking; engage in uproarious festivities
    "Let's whoop it up--the boss is gone!";
    - revel, racket, make merry, make happy, jollify, wassail [archaic]

Derived forms: whoops it up, whooped it up, whooping it up

Type of: celebrate, fete, fĂȘte