Ramajuan is the Mexican version of the popular Islam tradition Ramadan. Instead of fasting during Ramajuan, you must consume all food and drinks from Taco Bell for a 24 hour period. This must be completed one on one of the 30 days of Ramadan every year.
"Hey, where is Andrew?"
"Oh, I think he's on the shitter. He's celebrating Ramajuan and the Taco Bell isn't sitting right."