dernier [ˈdɜːnɪə(r)] a.
1.) Last; ultimate, final.
2.) dernier ressort: last resort; originally (in reference to legal jurisdiction) the last tribunal or court to which appeal can be made, that which has the power of final decision; hence, a last or final resource or refuge.
3.) dernier cri [French, literally 'the last cry']: the very latest fashion. Also in predicative use and (without article) attributively.
4.) dernier mot: the last word (Oxford English Dictionary 2nd Edition).
Etymology: adoption of French dernier, last, latest.
"The Right Honourable William Humble, earl of Dudley, G. C. V. O., passed Micky Anderson's alltimesticking watches and Henry and James's wax smartsuited freshcheeked models, the gentleman Henry, dernier cri James" (Ulysses, James Joyce, 1922).
(The Fighting Temeraire tugged to her last berth to be broken up, Joseph Mallord William Turner, 1839)
I'm pleased to report that this word finally allowed me to find a mistake by my hero David Foster Wallace. See, I originally discovered this word when I was rereading his essay "Up, Simba" the other month (and wrote it down in my trusty moleskin to save for later, as is my wont). He writes:
"One of the scrum's oldest and most elite 12M calls out one last time that surely after all there aren't any guns to the candidates' heads in this race, that surely Mike (the Monkeys call him Mike) would have to admit that simply refusing to 'quote, "respond"' to Bush and thereby 'staying on the high road' was something McCain could have done; and Murphy's dernier cri, over his shoulder, is 'You guys want a pacifist, go support Bradley.'"But he should have written dernier mot, as anyone can see. Probably he was relying on his knowledge of French. But dernier cri doesn't mean last cry in English, it means latest fashion. So, once again, not knowing French turns out to be a better strategy in life.