DD

DD stands for dad's dad. It is for the grandfathers biologically that aren't comfortable with the notion and image they grew up with of a kid calling said human, gramps, grampa or anything so-not-cool that they latch onto the much cooler sounding DD.

Who's this?
DD. My dad's dad. The coolest grandfather on the planet. When the grandfather image don't fit, you must acquit.

low I.Q. Democrat

A Republican

She smiled, no teeth, said something about stop counting the votes and I put her down as a low I.Q. Democrat....but I spell it Republican.