the search function does not recognize words with less than four letters it stands for Fucking New Guy or short for the main charactures name in The Call of the Wild
dunno, spose it coulda been 'figured it was an anacronym born of the digital age.. or maybe from the personals? as in "big breasted woman looking for FNG"
And there we have the FNG question for the month of April. Be sure to return in May for the same question.