Great question! We try to avoid using acronyms here, but sometimes they slip through.
The quick answer to your examples are...
DS = Dear (or Disney) son
DD = Dear (or Disney) daughter
MK = Magic Kingdom
DWQ = ?? not sure what this would be. Perhaps it was "DQ", which would be DisneyQuest, or "DWR" for Disney World Resort?
Other common abbreviations...
ADR - Advanced Dining Reservation
AK - Animal Kingdom
CM - Cast Member
DDP - Disney Dining Plan
DD - Dear (Darling, Disney) daughter (sometimes followed by a number, representing age)
DHS - Disney’s Hollywood Studios
DS - Dear (Darling, Disney) son (sometimes followed by a number, representing age)
DTD - Downtown Disney
EMH - Extra Magic Hours
Epcot FW - Epcot: Future World
Epcot WS - Epcot: World Showcase
FP - FastPass
HDDR - Hoop Dee Doo Review
MCO- Orlando International Airport
ME - Magical Express
MK - Magic Kingdom
MNSSHP - Mickey's Not So Scary Halloween Party
MP&PP - Mickey’s Pirate and Princess Party
MVMCP - Mickey's Very Merry Christmas Party
RD - Rope Drop
WDW - Walt Disney World
If you want more guidance on this topic, please note that one of the topic areas on this site is "acronyms." Simply click on the "General" topic on the left side of the screen, and a sub-topic of "acronyms" will appear. There you can find many other questions and answers related to this topic.
If you have any other questions for me, please feel free to submit a question with the link on this page