Top Definition
a contest between two women to see who can lose the most weight or be the thinnest by a given time. A diet dual may be proposed to resolve a disagreement between the contestants, much like the sword and gun duals in the days of yore.
Keira and Alessandra argued bitterly over who was sexier. Finally, they decided to settle their dispute with a diet dual. Whoever had the lowest BMI (Body Mass Index) by Valentine's Day would be declared the sexier of the two.
by wouldaben January 06, 2011

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