Promischievous

Awesome new word I heard at the corner store while hanging out with local dudes showing me how to play Keno for a dollar a play: "promischievous". Context: one guy said if he won money, 1st thing he'd do would be to buy a bottle of champagne and drink it all. I said I thought it was a bad idea, because then he'd make bad decisions with his money. He said he didn't drink champagne often; I said "even more reason not to do it, you'll lose your head like a sorority girl" and gave my best drunk sorority girl giggle. Another dude chimed in, "Yeah, you'll get all promischievous!" I said, "You mean mischievous and promiscuous?"