1. To be extremely surprised and displeased about
something.
2.
Something you do while waiting very anxiously for
something.
3. An exclamation of displeasure.
1. Man, he's gonna shit a brick when he finds out you wrecked his car!
2. ...so we're sittin' there shittin'
bricks waiting to see if the cop is going to give us a ticket!
2. Shit a brick! We've got a test in
Calculus tomorrow!