heh, some funny ones there.
Some not so funny ones that I think are the least used, but I guess use some, as they are here on BBB are:
ymmv your mileage may vary
tpiay the pleasure is all yours
rsn real soon now
sitd still in the dark
sit stay in touch
sohf sense of humor failure
bcnu be seeing you
Those are the ones I have never seen before, so I’m guessing they are the least common used ones.
~Sathallrin~