Slidey slope is a subtype of slope. It combines the properties of slidey and slope types. They can be very difficult to climb.
Borders required to touch: 2
Rank required: 3
Rotated with right click? Yes
Flipped with right click? No
There is an option to manually set the direction of a slope in the editor but, currently, the editor still auto-assigns a direction based on which corner has the most pixels filled in.