shit a brick
Definition from Wiktionary, the free dictionary
shit a brick (third-person singular simple present shits a brick, present participle shitting a brick, simple past shit a brick or shat a brick or shitted a brick, past participle shit a brick or shitted a brick or shat a brick)
- (idiomatic, vulgar) To react strongly or excessively, especially in anger, fear, or astonishment.
- If our boss finds out we did this and didn't tell him, he's gonna shit a brick.
- She was thunderstruck when she came face to face with the tomb of Sir Isaac Newton. At her age, and in that same place, my big brother Bernie, a born scientist who can't draw or paint for sour apples, would have shit an even bigger brick. Kurt Vonnegut, Timequake, 1997