Sentence examples for are slippery from inspiring English sources

The phrase "are slippery" is correct and usable in written English.
It can be used to describe something that has a slippery quality, often in a literal sense (like a surface) or metaphorically (like a situation or concept that is difficult to grasp).
Example: "The roads are slippery after the rain, so please drive carefully."
Alternatives: "are slick" or "are treacherous".