It sounds just like the kind of joke that is ubiquitous in today’s cheap-and-cheerful souvenir industry: “I went to Rome and all I got you was this lousy pen.” But the tongue-in-cheek inscription recently deciphered on a cheap writing implement during excavations in the City of London is in fact about 2,000 years old. https://www.theguardian.com/uk-news/2019/jul/27/joke-on-roman-souvenir-bloomberg-building-site-city-of-london