Wiktionary
n. A patch of accumulated small fragments of floating ice (less than about 2 metres big)
Usage examples of "brash ice".
He could see thin patches of brash ice lifting and falling, and as the ship rose he caught a striking glimpse of the ice islands—.
And strong winds kicked up waves in the polynyas, which in the summers broke the ice between them, creating regions of brash ice, a floating pack of ice chunks which growled so loudly as they rode the steep little swells that conversation in dirigibles overhead was difficult.
Here the daily trade winds over the open water of the summer bay had created waves large enough to break the remaining chunks of ice into what they called brash ice.
Above this new sea stood the nine mesas of the city, now nine cliff-walled islands, not very tall, their top gardens and remaining rows of windows truly strange-looking above the dirty brash ice.