Top Definition
A theory used by people in relationships. He/She tells him/herself that everybody besides their significant other has AIDS and if they cheat on their significant other, he/she will get AIDS and dies.
Kelvin was tempted to try and bang this bitch at the club, but thought about the Everybody's got AIDS theory, and decided to stay loyal to his girlfriend.
by SnakeBiter October 21, 2009

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