slippery slope

American  

noun

1. a dangerous and irreversible course.

   the slippery slope from narcotics to prison.

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slippery slope Idioms  

1. A dangerous course, one that leads easily to catastrophe, as in He's on a slippery slope, compromising his values to please both the bosses and the union. This metaphoric expression alludes to traversing a slick hillside, in constant danger of falling. [Mid-1900s]

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Etymology

Origin of slippery slope

First recorded in 1985–90

Example Sentences

It’s also a slippery slope: once you get used to having a little more cash in your bank account, it can be tempting to lower the percentage even further.

From MarketWatch • May 30, 2026

But letting the popularity of an activity determine its legality is a slippery slope.

From The Wall Street Journal • Apr. 14, 2026

For others, keeping secrets at all feels like a slippery slope.

From Slate • Sep. 10, 2025

That could be a slippery slope, one that would make the world’s game less local and more global.

From Los Angeles Times • Jun. 24, 2025

So Roz carefully picked her way up the slippery slope, while Brightbill fluttered along beside her.

From "The Wild Robot Escapes" by Peter Brown