The phrase implies partiality, suggesting favoritism that's not based on merit. In the family business, uncle Joe's son is clearly the favourite son.
Pro Tip 2/3
Exclusive Affection
The expression may hint at other members feeling less cherished or overlooked. As the teacher's favourite son, Jack often received the best roles in school plays.
Pro Tip 3/3
Emotional Undertone
The term can carry emotional weight and can be perceived as hurtful by others. The coach treated Jason as his favourite son, which caused tension in the team.