ハネムーンベビーMeanings1nounhoneymoon baby; baby conceived on one's honeymoonA child conceived during the parents' honeymoon. Casual, modern term used in everyday conversation.うちの子こはハネムーンベビーなんです。Our child is a honeymoon baby.ハネムーンベビーだとよく言いわれます。I'm often told I'm a honeymoon baby.