mad scientist

Meaning

1. A bumbling or eccentric scientist working on questionable projects, or a villainous scientist bent on destruction; sometimes, a complex character in whom these archetypes seem to vie for supremacy.
2. A stock character in fiction who embodies such an archetype.
3. A real-life scientist who is asserted to embody such an archetype.
4. Used other than figuratively or idiomatically: a scientist who is insane, power-mad, or similarly deranged.

Sources

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