Wiktionary
vb. (context idiomatic English) To fall over.
Usage examples of "topple over".
They're positive that such a thing, so tall and so exposed to the wind, is bound to topple over one day.
One final grunting shove, and they got the screen to topple over onto Same and Swingle.
Nu released the tiller and dived for the man, catching his tunic just as he was about to topple over the side.
In point of fact, he was doing so to make sure that he didn't topple over.
He was so thin that he looked likely to topple over if the wind came up.
He had to fight the sensation that this building -- the most striking piece of architecture on Hines Street -- was itself about to topple over onto the tracks.
With a sleepy sigh, she let herself topple over on the couch, only to be startled by a shower of silver coins.
If the Father would be so good as to topple over and crush loff like a dung beetle, I might even believe it.
Her slippers were silver as well, with heels so high that she was always half afraid she was about to topple over.
He continued, That tree, mark, that tree, mark, and that tree, markthose three are designed to topple over.
He bent down cautiously and snatched up the golden box before it could topple over the rim.
One war wizard moaned in fear and fell over his nearest fellow mage in his haste to escape, causing them both to topple over into the tent.