Here is a link to a
more extensive timeshare glossary, but as Denise indicated, it won't cover location and resort abbreviations/acronyms.
HHI = Hilton Head Island
OBX = the Outer Banks (of North Carolina)
Some others that you'll often see here:
AC = Accommodation Certificate. An extra week (for a small fee) offered by II as an incentive for depositing a high-demand week
EY = a timeshare that you get to use
every
year, contrasted with an EOY (every other year) timeshare, which is listed in one of the glossaries.
DVC = Disney Vacation Club
FF = Fairfield resorts
HGVC = Hilton Grand Vacation Club
MVCI = Marriott Vacation Club International
RHC = Royal Holiday Club
ROFR = Right of First Refusal (same as "FROR" included on the TUG listing that Denise linked)
SA week = South African timeshare
VC = Vacation Counselor, a phone rep at one of the exchange companies
WKORV = Westin Ka'anapali Ocean Resort Villas
WM = Worldmark
Resort views:
OF = Oceanfront
OV = Ocean view
GV = garden view or mountain view (or, occasionally, a parking lot view!)