adj. a non-derogatory term describing a state of being of sufficient weight to jiggle when one walks or performs other basic physical activities; roughly equivalent to 'pleasingly plump'
A: Did you see that girl?
B: Oh yeah, she was jiggalicious.
Describes the lower backside of a female's anatomy when it moves in a gelatin-likefashion with every step and appeal's to the eye as an object of desire.