When one consumes a mass amount of spicy mexican food thus paying for it the next day when one encounters severe explosive diarrhea where leftover floaty mexican food can be seen. This usually leaves behind fine toilet art.
Ex. Sara goes to Don Lorenzo's and eats the entire dish of chicken chimichanga on top of a basket of tortilla's with salsa and guacamole. About an hour later she sprints to the nearest restroom and experiences a mexican toothache.
1) Joe wasn't in his room so JP toothfairyed some of Joe's cigarettes, taking three and leaving 54 cents in the pack.
2) JP was drunk (again) and Eric's parents weren't home so he took some of their beers from the fridge, leaving a dollar where they had been toothfairy-style.