The phrase "slippery slope" refers to a situation where one action or decision can lead to a chain of negative consequences. There are several different synonyms for this phrase, each with its own nuances and connotations. Some possible alternatives include "downward spiral," which suggests a gradual decline that is difficult to stop, and "domino effect," which implies a series of events that build on each other. "Pandora's box" is another potential synonym, emphasizing the idea that opening one door can lead to a host of unintended consequences. Other possibilities include "tunnel vision," "chain reaction," and "negative feedback loop".