one after another/the other
one after another
Consecutively and in quick succession, with one person or thing rapidly following another in order (and usually indicating a large amount altogether). (Often formulated as "one (noun) after another.") The children walked silently, one after another, into the schoolhouse to begin their lesson. When I was cooped up in the house after my surgery, I started reading one book after another.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
ˌone after aˈnother/the ˈotherfirst one person or thing, and then another, and then another, up to any number or amount: The bills kept coming in, one after another.
Farlex Partner Idioms Dictionary © Farlex 2017