Hogwarts: My name is the Unforgivable Curse

"Hello, strange wizard, what is your name?"
"Avada Kedavra."
"Fuck! What are you doing?!"
"...I will call Avada Kedavra, Avada Kendavia."
"...Who gave you this bad name?"
"I heard it's the Department of Mysteries."
"You have a grudge against the Ministry of Magic?"
"No, they don't dare."
"...Then what should I call you? You can't just recite the killing curse when we meet, right?"
"You can call me: the leader of the technological explosion in the wizarding world, the pioneer of Muggle exploration of magic, the ruler of the Hufflepuff kitchen, the ducklord, the younofull..."