A snowball effect
Meaning
A process that grows faster as it gathers momentum.
Usage
Used when things compound quickly.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Snowball rolling downhill collecting more snow.
Used since the early 20th century in economics and media.