The web is awash in
Acronyms, Initialisms, and Alphabetisms, IMHO.
Are you old enough to remember
UNIVAC?
I like my current favourite,
WAIT, because it's a
Double Entendre, in the ironic sense.
WAIT (What Am I Thinking!), did I just say that out loud?
This is a tame one, give me your wild, hilarious or obscene examples.
WDE (WetDogEared)