tumble upon (something)(redirected from tumbles upon)
tumble upon (something)
1. Literally, to trip on something with one's foot. I wasn't watching where I was going and tumbled upon the root of a tree. The child tumbled upon the steps of the house.
2. To find, discover, or happen upon something casually or by chance. I tumbled upon this fantastic little café the other day. Let me know if you tumble upon my keys—I haven't been able to find them.