Frat boys around the country are prepping for their big day of inebriation. But not just the average Saturday, we’re talking about the day when rivers and beer flow freely, tinted the color of emeralds. And while we’re totally down with celebrating all things Irish, when it comes to supporting clovers in our home or on our bod, there’s a particular way we like to go about it. That “Kiss Me I’m Irish” tee should just step aside right now. We’ve got 15 beautiful ways to rock the shamrock all…