Freddy sighs..."Wilma are we having another D.T.R.?"
I will be the Designated Taint Rubber for this evening so you all can have fun
If someone is DTR, it means that they are excited to do basically anything. This is especially true of situations of craziness, ridiculousness, randomness, and spontaneity.
DTR can be a lifestyle. It can also be a mood.
friend - "Sure, man! I'm DTR!"
me - "Later we can go climb some buildings and point laser pointers at drunk people!"