パーッと

adverb

with energy; enthusiastically; going all out

Describes doing something with great energy, enthusiasm, or in a lively, all-out manner, often used for parties, celebrations, or spending money freely.

• 今こん夜やはパーッと飲のもう！

  Let's go all out and drink tonight!

• ボーナスでパーッと買かい物ものした。

  I went on a shopping spree with my bonus.