RES - red eared slider
MBD - metabolic bone disease - usually in the context of lizards or turtles, and usually caused by calcium deficiency or lack of UV light exposure
BTS - blue tongue skink
KSB - Kenyan sand boa
URI - upper respiratory infection
anery - short for anerythristic (lack of red pigment)
amel - short for amelanistic (lack of black pigment)
pied - short for piebald, a ball python morph with patches of white scales
Afrock - African rock python
RDR - Ralph Davis Reptiles
fauna - Faunaclassifieds.com
beardie - bearded dragon (Pogona vitticeps)
Some non-snake related, but since we do have forums encompassing other reptiles as well. If I find more I will add them!