This word is used to describe someone who is viewed as complex. Someone not easy to understand and no cannot be regarded as a simpleton.
Person 1: Have you seen Yanis? I can never seem to get an understanding of his personality or how he works.
Person 2: I happen to agree. He's a complexian at it's finest.
Person 2: I happen to agree. He's a complexian at it's finest.
by Beware The Hashi April 2, 2020