domino effect
noun/ˈdɒmɪnəʊ ɪfekt/
/ˈdɑːmɪnəʊ ɪfekt/
[usually singular]- a situation in which one event causes a series of similar events to happen one after the other
- Employers fear a domino effect if the strike is successful (= that there will be many other strikes as a result).
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domino effect