This is often a marketing term used by sellers on dark web forums or Telegram to suggest the credentials are "fresh" (unlikely to have been reset) or have a high success rate. Security and Legal Risks

Using such lists for email marketing is highly discouraged; it leads to blacklisted domains , high spam complaints, and severe legal penalties. How to Protect Yourself

Typically formatted as email:password or username:password in plain text or hashed form.

If you suspect your data is in such a list, security experts from Norton Support and Have I Been Pwned recommend: Combolists and ULP Files on the Dark Web - Group-IB