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Its a pairing between two American Idol 7 contestants David Cook and Jason Castro.

The term came up by adding surnames "Cook" to "Castro"

In this pairing, David Cook is top while Jason Castro takes the bottom.
Fan #1: "Did you see the insane amount of Cookstro happening during yesterday's show?"

Fan #2: "How could I miss that"
by Ayusama May 25, 2008
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