It looked as if he were about to upset not just the applecart but the entire market.
From the guardian.co.uk
Whenever the applecart may be up-ended Avraham will judge fairly and set it straight.
From the en.wikipedia.org
Tindall and Hape are a big part of that, so why upset the applecart?
From the mirror.co.uk
Later come weekly US jobless claims, which always have the potential to upset the applecart.
From the guardian.co.uk
It is the scale of the structure in a show garden which, I believe, often upsets the applecart.
From the telegraph.co.uk
It is now clearly emerging how easily history can so upset the applecart of complacent thinking.
From the morningstaronline.co.uk
Then again that would have really upset the electoral applecart.
From the guardian.co.uk
What really upset the applecart was Lugo's stance on land reform.
From the guardian.co.uk
However, unlike CSCO, it's actually in GOOG's best interest to upset the service provider applecart.
From the forbes.com
More examples
The planning that is disrupted when someone `upsets the applecart'
A handcart from which apples and other fruit are sold in the street
The Apple Cart: A Political Extravaganza is a 1928 play by George Bernard Shaw. It is satirical comedy about several political philosophies which are expounded by the characters, often in lengthy monologue. ...