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To have a bowel movement in a bathtub.
Great day - parade, festival, funnel cakes, shopping.... and then the baby log flumed in the tub...and one of her sisters was in there too!
by Matt Lispen October 16, 2010
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
by neilsonz January 20, 2009
The process of pooping on a girl's back, more towards the shoulder blades, and then pissing it down towards her ass. Resembles a log flume ride.
Keith: Yo, i just log flumed this girl last night.

Dan: o yeah, howd it go?

Keith: She loves that shit.
by Shotty December 04, 2007
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.
"Woah! Man I've just been log flumed!!"
by Josh Bird September 09, 2006
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 will slide 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"
by CFP February 22, 2006