Don't shit on my bricks 

In the 20s, the builders, when they were doing brick laying, they didn't have places to poop so it became popular to just poop in somebody else's bricks because you wouldn't want to poop on your own bricks because you would have to put those bricks up.

It is used modernly as a term of warning.

Person A: I don't have anywhere else to throw this trash so I'll just drop in on the floor of your car.

Person B: Don't shit on my bricks, mate. Shit on your own.

Don't shit on my bricks by bigguy1027 September 8, 2014