Australian slang for when a perpetrator sets out to disappear, in an attempt to leave no trace (which may not always be successful, as it was for Mr. Holt).
On
December 17, 1967, Harold Holt, the 17th prime minister of Australia, disappeared
without a trace during a spontaneous decision to stop his security cars while with his security team to go swimming in the sea near Portsea, Victoria.
An enormous search operation was mounted in and around the beach for days, but the body of the country's most important leader was never recovered.