Time And Relative Dimentions In Space.
A time/space machine concieved by the Time Lords. It has infinate rooms inside, including several console rooms, from which the ship can be piloted. Doctor Who stole a mark 40 TARDIS and used it to solve intergalactic wrong-doings.

Doctor Who travels in a time machine called the TARDIS--- Time And Relative Dimension (Dimensions) In Space.

With the TARDIS The Doctor can travel to any point in time and space.

The inside of the TARDIS is larger then the outside.

The TARDIS used to have the ability to disguise itself according to its environment around it, but in 1963 when it landed in London it became “stuck” in the form of a police box. The Doctor has given up trying to fix it, because he has grown fond of the police box shape.

Also the vessel’s navigation system is old and unreliable, which is why The Doctor explores the universe at random.

The TARDIS apart from having the luxury of time travel has an added feature of having an interior of infinate size contained inside a very limited physical space, this is due to the dimentional rift on the boundarys of the TARDIS front doors.
When you enter a TARDIS you are steping out of your reality and into another through the dimentional tear in space.

A device often wished for by software developers who have been given unreasonable deadlines to complete their work. Although typically this would be used to give the benefit of hindsight to oneself in the past, many would wish to use it to kill the parent/grandparent of the project manager, thus ensuring they will never have been born.

An Irish road worker's workload description in the dimensions of time and space.

(n.) Used as a retort or randomly placed statement to anything or at any given time. Invariably followed by the exact same retort, for as long as the many tardi can keep it up.

Slang for vagina that is bigger on the inside.