To have all the time or want more. To crave for usually a substance like drugs or nicotine from a juul or juno.

A person who can't get enough of something normally a drug or nicotine.
Alex is a fein for his juul
by Qqww December 14, 2017
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When someone wants something very badly and/or is addicted to something or needs something
Joey feins his juul when he isn’t ripping it.

I am feining water right I am so thirsty

That kid is a fein, he always wants rips.
by Joeyknowsbest August 11, 2019
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Someone that takes the thing you're supposed to have
"Bro stop feining on the blunt it's my turn"
by Girlllll299 June 21, 2017
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A female who hangs around guys to get free alcohol, weed, drugs, and etc.
Dude 1- "hey man that Emily chick is a real fein, I told her I had pot and she instantly asked if we could hang and smoke"
Dude 2- "yeah man she does that all the time with dudes"
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The word Fein is a term used mainly in Ireland. Its origins come from The Fenian Brotherhood and the Irish Republican Brotherhood (IRB). It is mostly used in Ulster (one of the four provinces of Ireland) and Scotland to include supporters of Irish Nationalism. It can be used as a derogatory word by inbred Hun bastards but is usually used between friends and is something all Irish should be proud of.
Yo Fein
What about ye Fein
Did you see that Fein beating that pack of Huns
by Fenian Boy January 17, 2011
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