What is a pinkey slang?

Excuse me, could you please elaborate on the term "pinkey slang"? I'm not entirely familiar with it, and I'm curious to know if it's a specific jargon used within the cryptocurrency or finance community. Could you explain what it means and perhaps provide some context in which it's commonly used? Additionally, are there any other related terms or slang that I should be aware of in this field? Thank you for your time and assistance.