Is Cosmo a guy or a girl?

Hello there, could you possibly clarify something for me? I've been hearing about Cosmo quite frequently lately, and I'm a bit curious about one detail. Is Cosmo a male or a female? I've seen some references that seem to indicate one gender, but others seem to suggest the opposite. I'm just trying to get a clear understanding, as it would help me better understand the context in which Cosmo is discussed. Could you please shed some light on this matter for me?