Tasseography

Tasseography (also known as tasseomancy or tassology) is a fortune-telling method that interprets patterns in tea leaves, coffee grounds, or wine sediments.
The terms derive from the French word tasse (cup), which in turn derivesf rom the Arabic tassa (cup), and the Greek suffixes -graph, -logy, and -mancy (divination).
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 the shapes suggested by them. They might look like a letter, a heart shape, or a ring. These shapes are then interpreted intuitively or by means of a fairly standard system of symbolism, such as: snake (enmity or falsehood), spade (good fortune through industry), mountain (journey of hindrance), or house (change, success).
Source: The Encyclopedia of Occultism & Parapsychology, Fifth Edition, Vol. 2 edited by J. Gordon Melton