1
general::
1. Also, hit the ceiling or roof. Lose one's temper, become very angry, as in Marge went through the roof when she heard she'd been fired. [Colloquial; first half of 1900s] 2. Reach new or unexpected heights, as in After the war, food prices went through the roof. [Colloquial; first half of 1900s]
American Heritage Idioms
2
general::
Phrase(s): go through the roof
1. Fig. Inf. to become very angry. • She saw what had happened and went through the roof. • My father went through the roof when he saw what I did to the car. 2. Fig. Inf. [for prices] to become very high. • These days, prices for gasoline are going through the roof. • The cost of coffee is going through the roof.
McGrawhill's American Idioms And Phrasal Verbs