go through the roof

go through the roof
1
. Fig. Inf. to become very angry.
- E.g. She saw what had happened and went through the roof.
- E.g. My father went through the roof when he saw what I did to the car.
2
. Fig. Inf. [for prices] to become very high.
- E.g. These days, prices for gasoline are going through the roof.
- E.g. The cost of coffee is going through the roof.