Here are some popular online codes for common subjects.
NIP-nurse in public
NAK-nursing at keyboard
DH-dear husband or if your mad at him dead husband ;)
SAHM-stay at home mom
WAHM-work at home mom
TC's-toxic chemicals (here any way)
There are plenty more and I will add to this list as I remeber them and please leave short codes that you know, I'll add them too.