Top Definition
1 a female who is so large she has her own gravitatonal pull.

2. A very fat female who is always calling skinny people fatass.

3. A very fat man who wants to have a sex change.
Hey did you guys know that the first jillanator came from lonoke arkansas.

Oprah is one big jillanator.
by DCT3369 May 24, 2011

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