This term is from the late 50s and is used to describe an unidentifiable ass problem.
Why’s Joe so grumpy today?
Ah, don’t pay any attention to him; he has thrombosis of the poop shoot.
He’s in the can again. I think he’s got thrombosis of the poop shoot.
Must be from the refried beans he had last night.
He’s gone to the doctors. His girlfriend
gave it to him up the ass with her strap-on and now he thinks he’s got thrombosis of the poop shoot.