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.