DashJ

The heir to the Anheuser-Busch fortune is appalled the company that bought his family out used a transgender person to advertise Bud Light ... saying, "My ancestors would have rolled over in their graves."

Billy Busch (not the host of "Extra") appeared on "TMZ Live" Friday to discuss his new book, "Family Reins: The Extraordinary Rise and Epic Fall of an American Dynasty," when Harvey asked him about the Bud Light ad featuring Dylan Mulvaney -- a move which triggered a massive boycott.

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