Brainiac (noun)

A highly intelligent person.

Origin:

1940s: from brain + -iac.

Examples:

1. He was considered a brainiac, with an IQ of over 150.
2. She was a brainiac and excelled in all her classes.
3. The team was looking for a brainiac to help them solve the problem.
4. He was a bit of a brainiac and often impressed people with his knowledge.
5. Brainiacs are often thought of as socially awkward or lacking in common sense.