a nodding acquaintance
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 nodding acquaintance with property laws. I have a nodding acquaintance with him, but I wouldn't feel comfortable asking him to help me on this project.
a nodding 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 nodding acquaintance with property laws. I have a nodding acquaintance with him, but I wouldn't feel comfortable asking him to help me on this project.