- George: "Yeah, well, I've never picked a fight in my entire life."
- Marty: "Look, you're not going to be picking a fight, Dad... Dad... Dad... Daddy-o. You're coming to her [ Lorraine's] rescue, right?"
- — The exchange between George and Marty
Daddy-o was a friendly term used in 1955 by teenage boys towards their friends.
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