Total Drama Island; A Canadian television show where 22 sixteen year old kids stay at a crummy old summer camp for 8 weeks. They form alliances, romance, and marshmallow ceremonies. Whoever doesn't receive a marshmallow walks down the Dock of Shame into the Boat of Losers and never return to Camp Wawanakwa for good
TDI or Trailer Density Index is a statistical measurement describing the ratio of Prefabricated housing to Stick-built dwellings within a one square mile area. A TDI of 1 indicates there is an equal number prefab and stick-built structures within the square mile of interest.
It is another way of referring to street racers and other drivers who stick to the rear end of your car like glue when behind you and can not get away when they are directly in front of your car.
This asshole in the ford in front me is a prime example of TDI.
People with severe cases of TDI can usually be found driving the main roads of a town at night.