0 a piece of metal (often in the form of a farmyard cock), placed on top of a building, which turns to show the direction of the wind. -- chong chóng gió
He is a weathercock, and their breath the blast that determines its direction.
I happen to live in a house with a weathercock on the top.
Suddenly, and without any warning, the weathercock swung and the policy changed.
All we have got is a well-intentioned weathercock.
A weathercock always finds it difficult to make up its mind.
Their salesmen are quick weathercocks of the position, who go back to the factory and warn of what is impending.
It is a very convenient form of words to find which, like the weathercock, in any wind that blows, will signify a different direction.
In this case, the weathercock was a windmill.