hundred thunderclaps; many thunderclaps
Literally 'a hundred thunderclaps'; used figuratively to describe a great number of thunderclaps or a very loud, thunderous noise. Often appears in set phrases like 百雷の如く (like a hundred thunderclaps).
Thunderous applause, like a hundred thunderclaps, filled the hall.
It was a roar as if a hundred thunderclaps had struck at once.
Compound of 百 (ひゃく, 'hundred') and 雷 (らい, 'thunder'). The exact historical derivation is uncertain, but it follows a common pattern of using large numbers to express intensity or multitude.