Personalized Let The Shenanigans Begin Long Sleeve T-Shirt. Funny St. Patrick's Day Long Sleeve T-Shirt - White with shamrocks says says Let The Shenanigans Begin. Perfect for St. Paddy's Day parties and Irish parades. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL