bookworm; bibliophile
A person who loves reading and spends a lot of time with books. Often used affectionately or self-deprecatingly.
She's a bookworm and spends all day in the library.
I've been a bookworm since I was a child.
Standard kanji spelling.
Katakana variant for 虫, sometimes used for emphasis or in casual writing.
Literally 'book insect', a metaphorical expression likening a voracious reader to a bug that lives in books.