also: ヒレざけ
noun
hot sake with grilled fish fins
A traditional Japanese drink made by adding grilled fins (typically from fugu or sea bream) to hot sake. Often served at izakaya or specialty restaurants.
寒い夜にはひれ酒が最高だ。
On a cold night, hot sake with grilled fish fins is the best.
この店のひれ酒はふぐのひれを使っている。
This restaurant's hirezake uses fugu fins.
Compound of ひれ (fin) and 酒 (sake). The name directly describes the drink: sake with fish fins.