Let me have it…
I’ve figured out IMHO, IIRC, FWIW…even TTTT!
But what in Sam Hell is “WAG”?!?
That would be “Wild Ass Guess” as opposed to a SWAG which is a “Super Wild Ass Guess”
WAG= Wild ass guess
SWAG= Scientific wild ass guess
Ok, I was guessing along those lines…pun not intended.
I kept wanting to think “Well Educated Guess”…but for some reason a small part of my brain didn’t want me to think that…
So, are there any others I should know of before we continue? 
Here, before this thread is locked
http://homepages.ihug.co.nz/~tajwileb/abbreviations.html
Thank you!
Mods, take her away!
salutes the thread