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1. titboy
A person who was born a man that goes under sexual reassignment surgery before the genitals are finished. Also known as a pre-op transexual.
John: That girl looks kind of manly.
Jose: She a titboy?
John: Wouldn't doubt it.
2. Titboy
A child who acts like a complete TIT
Look at little Johnny over there, he's such a titboy
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