Here's a few of the abbreviations I regularly use on my blog and their meanings. If there's anything else which you think needs to be added, let me know via the Contact form at the bottom of the page.
GBBD = Garden Bloggers' Blooms Day - a regular meme on the 15th of the month and hosted by Carol at May Dreams Gardens
GBDW = Garden Bloggers' Design Workshop - hosted by Gardening Gone Wild
GBMD = Garden Bloggers' Muse Day - another regular meme, this time on the first of the month and originally hosted by Carolyn Choi at Sweet Home and Garden Chicago
GNO = Girls' Night Out
NAH = Non-Allotmenteering Husband - might get renamed AH based on the amount of work he's done up there lately
NGS = National Gardens Scheme - aka 'Yellow Book'
NT = National Trust
OOTS = Out on the Streets - a look at public planting, hosted here!
RHS = Royal Horticultural Society
SUP = Stitched Up Posse - my fellow tapestry needler friends from Bath
VPGGB = VP's Guide to Gardening Bargains
YAWA = You Ask, We Answer - my tongue in cheek spoof magazine, which has also spawned its own Dictionary