(~s)
1.
A ~ is a large, flat, round stone which is one of a pair of stones used to grind grain into flour.
N-COUNT
2.
If you describe something as a ~ or a ~ around your neck, you mean that it is a very unpleasant problem or responsibility that you cannot escape from.
For today’s politicians, the treaty is becoming a ~...
That contract proved to be a ~ around his neck.
PHRASE: usu v-link PHR disapproval