How much is the banana gun fee?

Excuse me, I'm quite intrigued by this mention of a "banana gun fee." Could you elaborate on what this fee entails? Is it associated with a specific cryptocurrency transaction, perhaps a novel method of payment or perhaps a metaphorical reference? If it's a real-world cost, how much does it typically amount to? Are there any hidden costs or fees associated with it? I'm particularly curious about the context behind this term and how it fits into the broader landscape of cryptocurrency and financial transactions. Thank you for clarifying this for me.