friendship book (plural friendship books)
- A decorative stapled booklet or similar, made by an individual who writes their name, address, interests etc. inside and gives it to a friend or pen pal. The book is passed on from one person to another, each adding their own details, and eventually returned to the originator.
- Synonym: FB
- Hyponyms: cram, slam, slambook
- 2019, Manjit Bal, Lovingly Yours - Penpals
- Pen pals also make and pass around friendship books, slams and crams. In recent years, pen pal correspondence with prison inmates has gained acceptance on the Internet.