Most of these are know, some are just plain goofy. :)

3f = 3fold land, Waste
AS = Aes Sedai
Avi = Aviendha
BA = Black Ajah
BWB= Big White Book
Char = character
DF = Darkfriend
DO = Dark One
DR = Dragon Reborn
Granny = Grandael
Lanny = Lanfear
Sammy = Sammeal
SG = Shayol Ghul
SH = Shaidar Haran
SL = Shadar Logoth
Sniffers = Nynaeve and Elayne.
Sori = Sorilea
Toxic Twins/Putrid Pair/Decayed Duo = Aginor and Balthamel
Triad = Min, Avie, Elayne
WA = Warder
WC = Whitecloak
WT = White Tower


Here's some everyone knows..... :)
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tEoTW = The Eye of the World, book 1
tGH = The Great Hunt, book 2
tDR = The Dragon Reborn, book 3
tSR = The Shadow Rising, book 4
FoH = The Fires of Heaven, book 5
LoC = Lord of Chaos, book 6
Cos = Crown of Swords, book 7
PoD = Path of Daggars, book 8
WH = the book were all dying 4... Winters Heart, book 9