The best possible item ever placed on the Mcdonalds' menu. People wait hours just to buy one when they start selling them the month before St Patrick's day. A green vanilla mike shake (which may or may not be more addictive than crack.)
Person X: What the hell is this line for at McDonalds?
Person Y: They released Shamrock Shakes, again!
Person X: Is that a Mexican thing?
Person Y: Irish.
Person X: Ahhhh...bless the Irish and their dairy treats!
The Shamrock Surprise is a Secret Sexual Move and Art Form currently perfected by the Immortal God Tetley of Westfall. Rumor has it that 3 ho's have already died due to the fact that one must be "Pure of Heart" to not end up getting killed by the S.S.
I herd Bettygot killed while getting the Shamrock Surprise
Wow, did you see that, must have been the Shamrock Surprise