fiend, biografiend

The theory that regular cigarette smoking invariably turned the user homicidal was so widespread that it became a regular part of the insanity defense.

In the 1900s, Being a 'Cigarette Fiend' Was a Legitimate Defense for Murder

Smoking kills.

ATLASOBSCURA.COM

喬 伊 斯 則 謔 稱 biographer （ 傳 記 家 ） 為 biografiend（ 傳 記 鬼 ） 。

fiend
n.

1. 1. An evil spirit; a demon.
   2. The Devil; Satan.
   3. A diabolically evil or wicked person.
2. Informal. One who is addicted to something: a dope fiend.
3. Informal. One who is completely absorbed in or obsessed with a given job or pastime: a crossword-puzzle fiend.
4. Informal. One who is particularly adept at something: a fiend with computers.

[Middle English, from Old English fēond.]