British & Australian, American & Australian to not be feeling as well as usual.
He had flu a couple of months ago and he's been a bit off-colour ever since.
(redirected from be off-colour)
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."