1) To be extremely shocked, startled, or otherwise amazed.
2) Another way of saying "get pissy"
1) When you see it, you'll shit brix.
2) My mom shat brix when I brought the car home with a flat tire.
"Shitbrix", "Shitbricks" or "Shitting bricks" is when you are suddenly startled or afraid...So afraid that you could "Shit a brick".
"Shitbrix" is also a website- shitbrix.com
If a wasp suddenly buzzes past you, you may be suddenly terrified and shit a brick.
If you're watching a horror movie and something scary happens, you may scream and "Shit a brick"
If you visit the website shitbrix.com and you find something creepy in the pic, you may go "Holy SHITBRIX!!!!"
you will be fucking amazed when you see ut
tim goes"you have to see my dirtbike jump"
john goes "why"
tim goes "you will shit brixs"