The phrase is a portmanteau of several terms—"Desi" (referring to people or culture from the Indian subcontinent), "MMS" (Multimedia Messaging Service, often used as shorthand for leaked videos), "Scandal," and "Kaand" (a colloquial Hindi term for a notorious incident or controversy).
Searching for or distributing such content isn't just a moral issue; it’s a legal one. In India, several laws are designed to combat the spread of non-consensual explicit imagery: desimmsscandalkaand
A private video is recorded, often with consent at the time, but is later stolen, leaked by a disgruntled partner (revenge porn), or shared by hackers. The phrase is a portmanteau of several terms—"Desi"