when you
take a shit underneath a bed's mattress pad and then also between the mattress and the box spring. the victim will first discover the fecal matter under the mattress pad, and they will believe that the issue is rectified after cleaning that up. for a period of time afterwards, hopefully several weeks, the victim will continue to discover a foul smell, before they
eventually realize the second deposit underneath the mattress.
this
phenomenon resembles an Oreo where the mattress is the white filling between the two layers of chocolate.
"I just found out that my man has been cheating on me. it's
time to go to his house and leave him an
unpleasant surprise. I hope that him and his new
lady friend enjoy discovering this Uh-Oh Oreo!"