This is a bit embarrassing.  I've been a hobbyist for two years and a TER member for about 6 months.  Still can't figure out what many of the common abbreviations are.  Can someone help me?  I'll go ahead and guess at some, it might be funny!

DATY - dining at the Y
DATO - ?
GFE - girl friend experience
YMMV - ?
DFK - deep full kiss
LFK - ?

Any other s?

Still learning and having fun.

Crank

YMMV = Your Mileage May Vary
LFK = Light French Kiss (i.e. just a little tongue)

I still haven't figured out DATO either.

Take a look at this thread. It has nearly every term and abbreviation you can imagine.