A shortened version of "fiend" as in to fiend for something, jonesing, jonesin' etc. Usually when so desperate for addictive substance that the "feen" or person "feening" doesn't have time to complete the pronounciation of words, let alone entire sentences. Abbreviated for fiend.
FIEND:
1 a : DEVIL 1 b : DEMON c : a person of great wickedness or maliciousness
2 : a person extremely devoted to a pursuit or study : FANATIC *a golf fiend*
3 : ADDICT 1 *a dope fiend*
4 : WIZARD 3 *a fiend at mathematics*

(n) Norwegian. A town where almost every street is called Feenveien. Check out your favourite online mapping application iff'n you don't believe it.

To have a strong urge / desire to do something.

Feen (n)/(v)
Deriving from the word fiend; It was created by ignorant methuen children who misinterpreted the word fiend. They had no idea what it meant or how to spell it so they came up with feen. For a definition, please see "Fiend".

To want or need.

SEE: fiend

Feen is not a word or a term. FIEND is.

a Feen is someone who is constantly after someone's roll ups, weed, food, makeup, etc because they can't afford their own