Tm Abbreviations

I'm pretty new to this site and there are many abbreviations that I'm not familiar with. Some are pretty self explanatory such as:
Po = previous owner
TV = tow vehicle
TM =Trailmanor
WDH = weight distributing hitch
GVW = gross vehicle weight
CG = camp ground
Now for DW and DH, I understand the W and the H, but what about the D? Maybe Dumb, or Dear, or Dearest, or Dead, or Darling, or Dependent, or deaf??

Would you please add some so I can understand all the jargon on this great site?