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A Man that is obsessed and addicted to always looking good and clean. The word stems from the Personal Care products made by Fean and Company. Fean is popular for making the best grooming and skin care products.
1. Jack is such a Feanian, it takes him two hours to get ready for the night... What a Feaner!

2. You can tell he’s a Feanian… he pulls all the ladies.
by Anthony-JackBlack January 13, 2010
A word used to describe the underlings of Irish society.
Shakespeare said "Thou is a feanian found in younder Bog" (Richard III)

20th Cent "See you! You are a dirty feanian."
by Sir William Gull KC March 06, 2009