kenner
/ˈkɛnər/Definitions
1. noun
A person who collects or is enthusiastic about a particular item, especially toys or memorabilia.
“He is a serious collector and a die-hard fan, known as a Kenner collector for his vast collection of vintage Star Wars action figures.”
2. noun
A person who knows or understands something.
“You’re a true Kenner when it comes to the history of this city, so can you tell me more about its founding?”