a passing acquaintance with someone

a passing acquaintance with (someone or something)

A very limited knowledge of or familiarity with a given person or thing. I'll help you as best I can, but I only have a passing acquaintance with property laws. I have a passing acquaintance with him, but I wouldn't feel comfortable asking him to help me on this project.

a passing acquaintance with someone

If you have a passing acquaintance with someone, you know them slightly. To those with only a passing acquaintance he is charming and engaging. Note: You can also say that you have a nodding acquaintance with someone. And of course, he can now claim — after his first summit as head of government — more than a nodding acquaintance with his fellow leaders. Note: You can call a person a passing acquaintance or a nodding acquaintance if you know them slightly. He was no more than a passing acquaintance of Wright.