Nellericious is a form of taste mostly acquired by people with unhealthy eating habits. Usually, by those who undergo an elective weightloss surgery in order to take advantage of the system and bypass (no pun intended) the headache of eating right and excersizing. In any event, it should leave a bad taste in your mouth. See also Nellerphant. No, it does not mean a neller is an elephant.
Great! That greasy chinese food was nellericious. Bleh!