When there are changes to your life that are unexpected and not always wanted and you have to just accept it. A bit like a dick to the face.
John : How's Work?
Peter : It sucks, we have been told we need to stop saying "Yeet" when we throw rubbish in the bin.
John : That does suck, what a horrible Change Sausage.
When you need an excuse to leave the room to pop the weasel you can indicate that your shirt is dirty and needs to be changed. Hence, "I need to Change My Shirt." They'll never know.