Top Definition
The condition of being sexually or physically attracted to one's sibling. Mostly used in reference to a brother who is attracted to his sister.

From the popular si-fi fantasy series star wars, wherein the protagonist falls in love with his sister, leia.

My mother and father flipped when they found out I had developed a leia complex, and that is why I am in military school.
by Jrab June 17, 2006

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