The term "bookworm" has been used for centuries to refer to a person who enjoys reading or studying a lot. The earliest known use of the word "bookworm" in English dates back to the 16th century. It was originally used in a literal sense to describe a larva that feeds on books or paper, but it later came to be used in a figurative sense to describe someone who is very interested in reading.
The term "bookworm" is often used in a positive way to describe someone who is intelligent and well-educated. However, it can also be used in a negative way to describe someone who is considered to be too obsessed with reading and not interested in other things.