Italien

Italien / Italienne = Italian (both noun and adjective)

An interesting slang variation is rital (plural ritals). Although the shortening (dare I say apocope ?) of "italien" to "ital" is fairly clear, the "r" somehow remains a mystery. French newspaper Le Monde argues that it may be a remnant of the pronunciation of "parler italien" (to speak italian), where the final "r" in "parler" is vocal. I'd welcome any official answer on this one.