What is Upsidedown Sandwich?
1. A thing or situation that is unimportant, but when it is performed incorrectly, it is disturbing to the viewer.
2. Doing something the wrong way, when there is no right or wrong way.
Comes from resting a hamburger on a bun upsidedown after taking a bite.
Hanging the toilet paper the wrong way is like an upsidedown sandwich to Bill.