He's such a nutty professor, always lost in his own thoughts.
Он такой чокнутый профессор, всегда погружен в свои мысли.
Definitions
A 'nutty professor' refers to a university or college professor who is highly intelligent or knowledgeable but behaves in an eccentric, absent-minded, or unconventional manner. The phrase is often used humorously to describe someone whose brilliance is accompanied by quirky or odd behavior.
