What is D.r.?
1.
That which is right winged and very often close minded.
Rob: Come on man vote for McCain!
Cort: Lulz, don't be such a D.R.
See
2.
When someone is acting like a retard or in a retard like manner
eg your a retard is now your such a D.R.
Eg2 your so retarded becomes your so D.R.
See