Top Definition
A person who is mad about death and all things dark, Usually male he sits alone on a dark room and has very few close friends. Form the words : Madhatter and killing. Also slang for a long killstreak on a video game.
Oh my god killhatter is so Dark.

Wow, that guys is pulling a killhatter on this life
by GhilliEwok June 25, 2013

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.