We all have souvenirs — items that remind us of a place we visited or thing we did. But what happens when, instead of remembering your trip to Happy Fun Land, you want to remember the time you murdered some orphans or decapitated your mortal enemy?
The Creepy Souvenir is a sufficiently morbid item that is kept to show off the horrible thing(s) a character has done. Mostly, it's human body parts — [...] [tvtropes.org]