a passing acquaintance with something

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.
See also: acquaintance, passing
Farlex Dictionary of Idioms.

a passing acquaintance with something

If you have a passing acquaintance with something, you only know a little about it. These days a theatre-goer needs more than a passing acquaintance with science. Note: You can also say that you have a nodding acquaintance with something. We chatted for a little about poetry, with which he showed considerably more than a nodding acquaintance.
See also: acquaintance, passing, something
Collins COBUILD Idioms Dictionary, 3rd ed.
See also:
  • a passing acquaintance with (someone or something)
  • a passing acquaintance with someone
  • acquaintance
  • a nodding acquaintance
  • a nodding acquaintance with (someone or something)
  • nodding acquaintance
  • nodding acquaintance, a
  • passing
  • have a working knowledge of (something)
  • have a working knowledge of something