Term used to describe a person with restrictive eating habits. In an effort to keep calorie consumption at a minimum, restrictive eaters often choose mustard (a low-calorie pungent powder or paste prepared from ground mustard seeds) as their condiment/dip/sauce/meal of choice.
What is her secret for staying so thin? She must be a mustard eater.
by Mustard Mollie August 01, 2011