I'm feening some weed!
I'm fiending some weed!
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".
Smarty Pants: Hey man, you mean fiend? and fiend isn't a verb?
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*