あるのかな～

Earlier I wanted to use the phrase パーっとやる, but when I looked up パー in the dictionary there was nothing like what I was looking for. I'm pretty sure this is the phrase that I heard in Rurouni Kenshin when people were talking about partying, but now I'm not so sure. Does anyone have any idea about whether this phrase exists as I have it? Is it a case of mishearing what was said?

I personally take the expression more in salaryman conversations.
Boss: A君、今晩飲みに行くか？
A: 部長、いいですね。ボーナスも出た事ですし、パーっとやりましょう（いきましょう）。

That's the meaning I wanted to use it for. Thanks, pipokun!