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The first two-three months of a relationship in which both participants can not stand to be seperated from each other for periods longer than eight hours.

People suffering from the Crush Phase will often share every detail of the blossoming physical relationship they are a part of. Similarly, people around the victims of the Crush Phase will know how long it's been since last the couple has spoken, saw each other, and made out.
Laura and Mike need to get over their crush phase.
by Rushmore June 14, 2004
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