A super jiggly or naturally muscley jiggly thigh that is big in size and rumbles when the person is running. Primarily made for reallygood looking track girls.
1.21 jigglewatts represents the amount of ample curvature present in a female body that will turn an average male in to a blubbering puddle of stupid. It is not a measure of attractiveness as low jigglewattage females can be very sexy, example Madonna, Kiera Knightley and Milla Jovovich would score low (0.0.3) on the scale, while Scarlett Johansson and Kim Kardashian score near the maximum (1.21).