one-track mind

Definition

That said to be possessed by someone who is obsessed with something or only able to think of one thing.

Example Sentences

• "He has a one-track mind. All he ever talks about is trains and railroads."
• "You're nothing but a dirty, dirty old man / You do your thinking with a one-track mind"
• "I have a one-track mind, I have a one track-mind / There is a method to the madness, to the madness / Gotta have a one-track mind"