It rhymes with lotox:

Joe Biden looks . . . different.
Something about his eyes, which seem smaller, and his forehead, which seems smoother. Compared with images from last year, he seems better rested — yet also, strangely, a little sleepier.
Or go to YouTube: In the July 2007 CNN debate, his face turned sharp and keen with his impassioned call to send troops to Darfur, a frustrated pair of vertical lines in his brow as he described the suffering of refugees. This month, debating Sarah Palin, we heard similar anger in his voice about a lack of funding in Afghanistan — but saw a tranquil brow.