What is a smurf cat?

Excuse me, but could you please clarify what exactly a "smurf cat" is? I'm not familiar with this term and it's not something I've come across in my work in cryptocurrency and finance. Is it a type of feline breed, a slang term, or perhaps a reference to something specific within the cryptocurrency space? I'm genuinely curious to learn more about it, as it's not a concept I'm immediately familiar with.