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Verb: splash out
Usage: Brit, informal
  1. Spend money extravagantly, esp. to indulge oneself
    "I splashed out on a new TV";
    - splurge [informal], lash out [Brit, informal], lash [Brit, informal]

Derived forms: splashing out, splashed out, splashes out

Type of: consume, squander, ware [archaic], waste