slippery slope

The phrase "slippery slope" refers to a situation where a relatively harmless action or decision leads to a series of increasingly problematic or undesirable consequences. It suggests that once a certain course of action is taken, it becomes difficult to stop or control the subsequent negative outcomes. This term is often used in discussions and debates to illustrate the potential dangers of allowing one action or policy, as it might set a precedent for further, more severe actions or policies.