Something that immature little boys do to girls when they're too cowardly to say they're no longer interested. This results in the boy feeling great he got away so easily without any "drama" but leaves the girl with an inordinate amount of pain, anxiety and over-thinking about what the hell she did/said/texted wrong.
A phenomena made popular in modern society with the more disposable forms of communication such as text messages thereby removing the ghosted from any culpability or having to deal with a real face to face response.
Hey did you hear from Rick since your last date??
Rick? Oh you mean Casper! He's been ghosting me since Saturday - disappeared without a trace!