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splurge
1.To indulge in an extravagant expense or luxury.
2.To be showy or ostentatious.
verb transitive:
To spend extravagantly or wastefully.
noun:
1.An extravagant display.
2.An expensive indulgence; a spree.
Source: The American Heritage® Dictionary of the English Language, Fourth Edition
Synonyms:
affectation, an act, arrangement, array, arrayal, blaze, bravura, dash, demonstration, example, exhibit, exhibition, expo, exposition, exposure, fanfare, flourish, for show, frame up, frippery, front, grandstand play, layout, manifestation, ostentation, ostentatiousness, pageant, panorama, parade, pedantry, pomp, presentation, pretension, pretentiousness, revelation, sample, scene, shine, show, showboat, spectacle, splash, splendor, splurge, spread, unfolding, vanity
(Perhaps splurge is a blend of splash, and surge)