Preppers (The general term for anyone making preparatory plans for self reliance in the event of an major event) use quite a few acronyms and abbreviations which at first glance make little sense until you check out what they mean!

I have created the following list from a number of sources so hopefully everything you need is here (important and more frequently used terms have been highlighted):

 

ALICE All-Purpose Lightweight Individual Carrying Equipment
ATL Attempt to Locate
BIB Bug In Bag. A kit of essentials designed for “hunkering down” instead of bugging-out
BOB Bug Out Bag. A kit of essentials also called a 72hr bag.
BOL Bug Out Location
BOV Bug Out Vehicle
Carrington Event A naturally occurring EMP-like effect caused by a large Coronal Mass Ejection (CME) of the sun (Wikipedia)
CM Compressed Meals (The U.S. Army’ new alternative to MREs, with a freeze dried entree. These are about 2/3s the size and weight of an MRE)
CME Coronal Mass Ejection (solar flares)
C-Ration Combat ration. The U.S. Army canned field rations that were replaced by MREs and now CMs
CYA Cover Your Ass
DLP Defence of Life and Property
EDC Every Day Carry
EMP Electromagnetic Pulse (Wikipedia)
FAK First Aid Kit
Farady Cage A shielding enclosure for electronics (Wikipedia)
FEP Family Emergency Plan
FIFO First In, First Out (used for food storage rotation)
FOB Forward Operating Base
FWIW For What Its Worth
GDE Grid Down Event
Genny Generator
GMO Genetically Modified Organism
GOOD Get Out Of Dodge (same as Bugging Out)
Ham Amateur radio operator
HDPE High Density Polyethylene, a food grade plastic for containers
HEMP High Altitude Electromagnetic Pulse
IMHO In My Humble Opinion
IMO In My Opinion
INCH I’m Never Coming Home.
JBT Jack Booted Thug
JIC Just In Case
KISS Keep It Simple, Stupid!
LOS Line of Sight. Used to refer to an unobstructed path between points.
MAD Mutually Assured Destruction
MOE Measures of Effectiveness
MOI Mechanism of Injury
MOLLE Modular Lightweight Load-carrying Equipment
MRE Meal, Ready to Eat (U.S. Army field rations)
NINJA No Income, No Job or Assets
Pollyanna Someone that is in denial that TEOTWAWKI could occur and remains cheerfully optimistic even in the face of overwhelming evidence.
Prep Prepare
Prepper Prepared individual
Preps Preparations
Rawlesian Preppers who follow the survivalist philosophy of author James Wesley Rawles
Shelf Life How long products will last in storage before becoming unusable or diminishing in quality. When referring to batteries, it is the life before the charge has fallen to 85%
SHTF Shit Hits The Fan
SOL Shit Out of Luck
SOP Standard Operating Procedure
TEOTWAWKI The End of the World as we Know It (Pronounced “Tee-ought-walk-ee”)
WROL Without Rule Of Law
WTSHTF When the S*** Hits the Fan
YOYO You’re On Your Own
Zombies The obvious meaning PLUS used to describe the people that have not prepped and will be begging or stealing from you WTSHTF! (see HappyPreppers)

 

Edited 21/04/15:  GDE added