be off-color

be off-color

To be rude or vulgar; to be likely to offend others, especially due to being sexually explicit or suggestive. A: "What did you think of the awards ceremony last night?" B: "The presenter's jokes were a bit too off-color for my taste."
Farlex Dictionary of Idioms.
See also:
  • off color
  • off-color
  • be near the knuckle
  • near the knuckle
  • off colour
  • off-colour
  • suggestive
  • suggestive of
  • suggestive of (something)
  • sixty-nine