have a one-track mind
To be consistently fixated on or preoccupied by a particular topic. Jerry, you have such a one-track mind—not everything has to do with sex. My sister has a one-track mind, only thinking about how something can further her career. George has a one-track mind when people hurt him. That's why he ends up holding grudges all the time.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
have a one-track mind
Fig. to think entirely or almost entirely about one subject. Adolescent boys often have one-track minds. All they're interested in is the opposite sex. Bob has a one-track mind. He can only talk about football.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
have a one-track mind
If someone has a one-track mind, they always think or talk about one subject. He has a one-track mind when he's working on a project — he thinks of nothing else. No, Sam, I wasn't referring to sex. You've a one-track mind, that's your trouble! Note: This expression is often used in a humorous way to say that someone thinks or talks a lot about sex. Note: This probably refers to a single-track railway, which will only allow trains to move in a single direction.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
have a ˌone-track ˈmind
think only about one subject: James will always bring sex into a conversation if he can. He’s got a one-track mind.Farlex Partner Idioms Dictionary © Farlex 2017
one-track mind, to have a
To be focused on a single issue, action, or undertaking; to be unable to take on more than one thing at a time. This cliché refers to the single-track railway line, which allows traffic in only one direction at a time. In a 1917 speech President Woodrow Wilson said, “I have a single-track mind,” one of the early figurative uses of the term.
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer