splurge 
(splûrj)
(splûrj)v. splurged, splurg·ing, splurg·es
v.intr.
To indulge in an extravagant expense or luxury: splurged on room service.
v.tr.
To spend extravagantly or wastefully: splurged his last dollars on sunglasses.
n.
1. An expensive indulgence; a spree: a splurge in a fine restaurant.
2. An extravagant display or large amount: a splurge of flowers.
[Perhaps blend of SPLASH and SURGE.]
splurgy adj.