The Eleventh of May. A day of celebration for teenagers of English, Dutch, or Swedish, decent across the U.S. but primarily in Southern California.
Nathanael: "Don't forget about May 11th."
Wesley: "I couldn't possibly, you've only told me like a hundred times."
Nathanael: "Haha."
Wesley: "Don't worry about it, dude. It is Once De Mayo after all. We're totally gonna party."
Wesley: "I couldn't possibly, you've only told me like a hundred times."
Nathanael: "Haha."
Wesley: "Don't worry about it, dude. It is Once De Mayo after all. We're totally gonna party."
by George Weasley May 19, 2007
 Get the Once De Mayomug.
Get the Once De Mayomug.