tumble on
Advanced (C1)informal
To find something by accident without looking for it, or to keep going in a messy way.
"While cleaning the attic, she tumbled on a box of old love letters."
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Professor Jiang: Is World War 3 About To Begin?
The Diary Of A CEO · 79:52
So, you think Iran is going to Iran as a war is going to tumble on for decades
The REAL Reason Trump Can Get A Third Term
The Diary Of A CEO Clips · 11:28
So, you think Iran is going to Iran's is a is going to tumble on for decades