three-hour tour
When something takes much, much longer than you thought it would. A reference to Gilligans Island.
"That meeting was a total three-hour tour. It was only supposed to last 30 minutes!"
three hour tour
Something that takes longer than expected. The term is a reference to Gilligan's Island, in which the characters take off for a 3 hour tour but end up stranded on an island.
"How was your bike ride?"
"Sucked, it ended up being a three hour tour after John lost the map"
"Sucked, it ended up being a three hour tour after John lost the map"