What text would you stamp in your books?

I found an old stamp at the thrift store today that allows for up to six lines of personlized text and I figured it might be a fun way to mark the books in my collection. I thrift most of my books and love finding writing or stamps in them, especially if it makes me laugh, so why not add some of my own?

So I turn to reddit for some inspiration. If you could stamp any text into your books, what funny/parctical/absurd/wicked text would you choose?

by planoodle