1. a bad situation that if not changed, will only continue to get worse
Professional
Social
someone is on a slippery slope to a life of crime
A 'slippery slope' is an action or decision that will probably make things worse or which is likely to lead to something dangerous or unwanted. A slope moves downhill, so the implication here is that the decision or action will lead to someone's downfall. This is an informal idiomatic expression.