I'm not sure if this is were this thread should go, but I was windering What does SO, DH, and some of the other acronyms that are used on TCS stand for?
Some that aren't on that linked list are inlaws... MIL (mother-in-law) and some cat related ones like DLH (domestic long hair) DSH (domestic sorth hair) MC (maine coon)... if in doubt ask in thread what a person means by an acromyn. It's likely that you aren't the only one who doesn't know.