Today's idiom is " knock over ".
This means to hit something (normally accidentally) and it falls down.
Example 1
Oops. Damn it! I knocked over my coffee cup.
Example 2
Be careful or you'll knock over that vase.
Example 3
A. Who knocked over the box of cereal?
B. I think the baby did.
https://idioms.thefreedictionary.com/knock+over