- This article is about the character. For the guest star, see Ronaldo (guest star).
- "I travel the world, exposing floppers. And your daughter is a flopper."
- ―Ronaldo to Homer Simpson
Ronaldo is a Brazilian soccer player who exposes floppers.
He got on Homer and Lisa's nerves when he exposed Lisa as a flopper. Homer accepts that she is and gives Lisa a red card, angering her. The rest of the family (except Marge) later play soccer with him.