Similar to an upper decker, however the turd is taken in the upper tank of a gravity fed toilet (those which the tank is suspended 6ft up). When flushed the turd is sent flying down the pipe fed by gravity and makes a large splash similar to that of a log flume ride.
A term often used in software development, when the technical team are trying to troubleshoot a customer problem. This term usually suggests that the technical team is constantly asking the customer for log files.
Manager: Did you manage to troubleshoot the issues that Technico had?
Neils: Not yet, I've taken them for a ride on the log flume until I can figure it out