The definition of cup of tea is an expression that is used to describe something you like, something you are good at or something you enjoy doing.
An example of cup of tea is sewing to a seamstress or knitting to a knitter.
cup of tea
- a favorite or well-suited thing, activity, etc.: golf isn't his cup of tea
- a thing to be taken into consideration or account; matterused esp. in the phrase a different cup of tea
(plural cups of tea)
- The second sense is most commonly used in phrases such as, not my cup of tea, just my cup of tea, etc.