Made a Grunny
You take a dump in someone’s toilet and leave it to rot while they're gone and wait for the smell to hit them like a brick
I took a dump in my cousin’s toilet and left it to smell like a dead animal in a trash can.
I made a Grunny in my mom’s bathroom and she came back to a stink that could kill a man.
I crapped in my neighbor’s toilet and it smelled like a million dead rats.