1.
Something that is ~ is smooth, wet, or oily and is therefore difficult to walk on or to hold.
The tiled floor was wet and ~...
Motorists were warned to beware of ~ conditions.
ADJ
2.
You can describe someone as ~ if you think that they are dishonest in a clever way and cannot be trusted.
He is a ~ customer, and should be carefully watched.
ADJ disapproval
3.
If someone is on a ~ slope, they are involved in a course of action that is difficult to stop and that will eventually lead to failure or trouble.
The company started down the ~ slope of believing that they knew better than the customer.
PHRASE: N inflects, usu down/on PHR, oft PHR to n