could teach (someone) a thing or two (about someone or something)(redirected from could teach a thing or two about him)
could teach (someone) a thing or two (about someone or something)
1. Could inform someone of the facts or several pieces of information (about someone or something). I know you're from the countryside and not used to city folk, but I could teach you a thing or two about New Yorkers. If you want to learn about the history of cinema, then you should ask Jeff—he could teach you a thing or two.
2. Could correct or confront someone about his, her, or their mistaken belief or incorrect point of view (about someone or something). That jerk has been making snide remarks all night. I could go over there and teach him a thing or two about how to talk to women!
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
can/could teach/tell somebody a ˈthing or two (about somebody/something)(informal) be able to help somebody, or teach somebody how to do something, because you have more experience: He thinks he knows a lot about farming, but old Bert could teach him a thing or two.
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