No sooner had the Biafrans and Ethiopians all been fed with cheeseburgers and said "thanks the West we couldn't eat another thing", the Cambodians started starving too. So Blue Peter wheeled out the thermometers again, and did what Blue Peter did best - distilled an involved tale of tragedy into a single word insult.

"Cambo" wasn't used to insult the thin kids. The pot-belly of malnutrition made it look like those poor, poor children had been walking like Pac-Men, greedily scoffing air.

A Cambo was therefore a child so desperate for food that they will eat air or sand in addition to their already huge rations of chips and Aztec bars.