1a flounder (flatfish), often eaten as sashimi; refers to certain species of flatfish.
今夜はひらめの刺身を食べに行こう。
Let's go eat flounder sashimi tonight.
市場で新鮮な平目がたくさん並んでいる。
There are many fresh flounders lined up at the market.
ヒラメは砂地に潜んで獲物を待つ魚だ。
The flounder hides in the sand and waits for prey.
2specifically the olive flounder (Paralichthys olivaceus), also called bastard halibut in some contexts.
養殖の平目は刺身や焼き物に利用されることが多い。
Farmed flounder is often used for sashimi or grilled dishes.
この漁港はヒラメの漁獲量が多いことで知られている。
This fishing port is known for its large flounder catches.
3a slang term for a toady or someone who flatters superiors; a sycophant.
あの部署の係長は上司にだけ愛想よく、周りからはひらめと呼ばれている。
The section chief is friendly only to the boss and is called a 'hirame' by colleagues.
出世のためにひらめのように振る舞う人が増えていると嘆く。
He laments that more people are behaving like sycophants to get promoted.