The event that happens after Cinco de Drinko parties or Drinko de Mayo events.
Basically, the 6th of May has a horrible hangover due to a Mexican/Chicano holiday where you drink Margaritas and Alchol in celebration of a Miracle at the city of Puebla, Mexico where some Mexican Thug Peasants kicked the asses of some Frilly French Dudes.
"Hey Juanita, you coming to work tomorrow?"
"Nah, Lucita and I have horrible headaches from Cinco de Mayo."
"Ah, Hangover de Mayo. Later."