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FA~GEN /fay-g<i>n/ noun: 1) an allusion to some aspect of culture (music, literature, film, art, etc.) that alienates at least one person (generally more) in the social setting, creating awkward tension and disinterest. 2) an overtly obtuse reference:

Everyone at the barbeque enjoyed discussing Dennis Hopper's films until Carrie busted out the "Straight to Hell" fagen.

(from American, Donald Fagen, of Steely Dan fame.)