noun
mad scientist
Refers to a fictional or eccentric scientist who conducts unethical or dangerous experiments, often in a stereotypical 'mad scientist' role.
彼は地下室で怪しい実験をしているマッドサイエンティストみたいだ。
He's like a mad scientist doing suspicious experiments in the basement.
アニメのマッドサイエンティストは世界征
The mad scientist in the anime was plotting world domination.