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1.
A child that a gay person had with a member of the opposite sex before realizing that he or she was gay.
"Melanie took her daughter Blossom to the park this morning."

"Melanie and Candace adopted a child?"

"No, Blossom is a pre-gay bio-child from Melanie's marriage to Mark a few years ago."
by Commentator X April 27, 2010