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
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.
The log flume is when you take a dump on someone's chest, and urinate on the chest shortly after. As you urinate the excrement willslide down the chest and stomach the same way a log would.
Ashley was an extremely kinky girl. Everytime I saw her she wanted me to give her the "Log Flume"