I think the questioner picked NewMoon's answer because there is no word in current use in English which answers the question.
Nugry is not a traditional English word. It is a neologism (new word) created by corrupting (altering) the word "newbie," which means a novice, someone new to a game or social group (usually online). "Nugry" is used instead of "newbie" only by a very small community of word-puzzle fans on Usenet, an online network. In that joking context, it is pluralized oddly. Instead of "nugries," the plural is "nusgry." This is not a normal English plural form; it is just a joke.
http://www.urbandictionary.com/define.php?term=nugryhttp://dictionary.reference.com/search?q=nugryThe joke itself as presented by the questioner here is incomplete.
Here's the whole story. The joke is based on misdirection; people look for the third -gry word instead of choosing the third word in the the phrase "the English language."
There was once a puzzle that read something like this: "One word that
ends in GRY is ANGRY, and another is HUNGRY. There are three common
words in THE ENGLISH LANGUAGE. What's the third?" The point is that
there is no third common English word that ends in GRY, and the victim
of this riddle tries and tries to find one, only to eventually be told
that LANGUAGE is the third word. Ha ha ha. Thanks to Usenet, the red
herring bit of the puzzle has completely lost its host, and people are
trying to find a third word that ends in GRY.