There are lots of these abbreviations in Lonely-Heart adverts. Here are just a few...
LTR = long term relationship
N/S = non-smoker
WLTM = would like to meet
OHAC = own house and car...
I'm sure there will be many more added here.
Not sure if this is relevant or how to put this - 'see you next Tuesday' is used in the opposite way - taking the words as initial letters i.e. see (C) you (U) next (N) Tuesday (T). Said in the context of ' he is a right see you next Tuesday' .