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The T.D. unit is a new unit to enter the SI system of units. The T.D., otherwise known as the Toan-Dang, is a way of measuring stink/pong levels of someone or something.
A T.D. unit gives you a way of measuring odours. 0 T.D.'s indicates a neutral atmosphere, where as the definition of 1 T.D. is the peak of one's body odour. 2 T.D.'s would be twice as worse and so on. 4 T.D.'s is critically bad where 5 T.D.'s is death.
by grouch johan December 9, 2008
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