Some old fuck was yelling at me for no reason, so I walked past hi, gave him the finger and yelled, "Ahhh, bite my ass, you peckerwood son-of-a-bitch!"
The act of readdressing an issue or task after you thought it was already finished.
A metaphor: Taking a crap and then having to pull the poop out of the toilet and stuff it back into your butt.
After six months of work on this project, my boss signed off on it. Now its two weeks later and we find out that we were working off the wrong specification. So now I've got to gostuff shit back into my ass.