What does fee fee mean?

Could you please clarify what you mean by "fee fee"? In the context of cryptocurrency and finance, the term "fee" typically refers to a charge or commission that is assessed for a particular service or transaction. For instance, when you make a trade on a cryptocurrency exchange, you may be charged a fee for the service of facilitating that trade. However, "fee fee" is not a commonly used phrase in this field, so it's possible that you're referring to a specific situation or context where the term is used. Could you provide more context or details about where you encountered the term "fee fee"?