Top Definition
Determining the success or potential success of a relationship by whether one person in the relationship loves olives while the other person hates them.
Marshall and Lily in "How I Met Your Mother" argue that based on the Olive Theory, they are an awesome couple based on Marshall's hatred of olives and Lily's olive love.
by Barnabus Stinson January 24, 2009
4 Words related to Olive Theory

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