Here are a few abbreviations that I see around, some (*) are ones that I assume is the abbreviation; I just never see the full word mention nor the abbreviation mention.
In Sales
ISO - In Search Of
LF - Looking for
TH - Toyhouse
- Depends on context.
Boosts/Defects
LF - Light Fallow
- Depends on context.
DF - Dark Fallow
MB - Matron's Blessing
- not sure if this gets used too much
KB - Karmic Blessings*
AV - Adaptive Vitality
CP - Celestial Prosperity
DS - Deadly Silent
AP - Archiac Pride
MA - Muted Awareness
OP - Outstanding Precision
FB - Fortuitous Boldness
Viti - Vitiligo
Sitewide
BD - Birth Defect
DG - Deathgrip
BL - Bloodline
DS - Deathscript
Repeats
GB - Gaelic Blood
SV - Surpassing Valor
UL - Unparalleled Learning
G# - Generation #
#R - Rarity score
#T - Talent count
+/-#V - Vitals total score, hero if all are positive, neutral if mixed, and coward/villain if all are negative
Wrestling, Howling and Disposition are each different. The first two letters of the rating (Excellent) and then the first letter of the vital (Wrestling).
OC - Original Character
YCH - Your character here
CP - Character Points
AC - All common stats (nose, eyes, pelt rarity)
LW - Lightweight^ (below 90lbs)
MW - Midweight^ (90-129lbs)
HW - Heavyweight^ (130-150lbs)
If I think of more, I will edit this post. Some, few or a lot of these may be repeats, but I figured might as well list what I know.
Winter 
Night 
Clear Moon: 
