NWAirlink CRJ Accident?
Does your question relate to the NWAirlink CRJ accident last December? I've heard that phrase being used in connection with that investigation. This is just what I've heard from people on the property, but they used the phrase you're talking about.
After the inflight stall and failure/flameout/shutdown the crew did not get the engines going again. Because of insufficient airspeed both CF-34's cores were not rotating at all (core locked) and contributed to them not being restarted in flight.