A mexican woman that bitches/ditches her friends by going MIA for weeks at a time. A Mexibitchditcher also goes pee a lot, eats lots of candy, resembles Lady Gaga, and often dislikes any Polak and/or German people.
Having eaten so much mexican food, only a slice of mango can cure the -itus. It is also a heat-related syndrome, and tends to increase overall lazyness.
Oh man, all those tacos gave me mexicitus... pass me the pacifico.