Tea cup/leaf reading also known as tasseomancy, or tasseography or tassology is a divination or fortune-telling method that interprets patterns in tea leaves, coffee grounds, or wine sediments.
After a cup of tea has been poured, without using a tea strainer, the tea is drunk or poured away. The cup should then be shaken well and any remaining liquid drained off in the saucer. The diviner now looks at the pattern of tea leaves in the cup and allows the imagination to play around [with] the shapes suggested by them.