Fiend

[Sarah]

A man who craves a certain substance, usually a drug. Various types of fiends exist, such as the [tweaker], the [crackfiend], the [pothead], the [cokehead], etc.

[Little_Girl]

to fiend; to crave or need something

[Becky]

one who is really weird and/or goes crazy (is obsessed with) a certain thing/person

[Mark Zuckerberg]

n

devil: an evil supernatural being, especially a devil from hell

somebody evil: somebody who is extremely wicked or cruel (or ]bitch]-like)

troublemaker: somebody who is mischievous or annoying

person with strong interest: somebody who is keen and devotedly interested in a particular topic, occupation, activity (i.e. [Narcotics])

somebody proficient at something: somebody who has a specialized skill or talent (informal)

The incorrect spelling of the word [friend]. Often used by uneducated teenagers or people in a hurry.

A really addicted [druggie].

[Tina]

a person who is exceptionally distraught when unable to acquire the drugs he is craving

[Mark Zuckerberg]

(verb) To scrounge desired items by any means necessary.
(noun) A person who implements the verb form of fiend.

[Couch Potatoe]

Someone who wants something so bad that they will give anything to get it.

[Sonia]

a devotee or user of whatever is indicated

[Merna]

An evil spirit or demon.