Despite semi-regular use in the vernacular of many Australians, a recent survey revealed that nobody has actually read any tea leaves for almost 60 years. According to the results of the survey, the last known reading of tea leaves occurred in October 1959. 

The reading of tea leaves is an ancient fortune telling practice in which a person looks for patterns in the way tea leaves sit on the bottom of a tea cup. No reputable university in Australia offers tea leaf reading studies, which seems to have critically injured the practice in this country. 

Despite the fact people no longer read tea leaves, the phrase seems to be here to stay, with accuracy of meaning never being an essential ingredient for popular sayings.