Developmentally disabled as to refer to those who are Developmentally Disabled.
I was hired as the director of a group home with 4 DD clients ranging from profound retardation to Physical cerebral palsy.
Pronounced "Deed"
A colloquial adjective local to northern New Jersey, refers to anything negative in a comedic manner.
"I can't believe I didn't finish the project!"
"Dude... we're so DD."
The hierarchical rank symbol used within a systematized way of organizing specific objects.