The correct term for a ski jump on aircraft carriers. Used by has-been navies that can’t afford catapults (see Admiral Kuznetsov). Bri’ish “people” citation needed will insist that they’re actually called “champ ramps”. Ignore them.
A slippery slope is a situation in which events or actions readily progress from one to the next.
When the mother found an empty bottle of whiskey in her lazy teenage son's bedroom, she warned him he was on a slippery slope toward a life of indigence and destitution.