"Flobbing" is the act of very slow
sex, whether it be passionate or
boring. The position in which the
sex is done doesn't entirely matter towards it being 'flobbing', but some positions are more appropriate than others.
(I.e. Kneeling down to do oral isn't exactly flob-y, but 69ing could be).
Jason: Hey I heard you hooked up with Kayla last night, how was it?
Todd: I couldn't get very into it, so we just flobbed for most of the night, I didn't even cum.
Jason: Damn, that's rough.
(Alternatively)
Jason: Hey I heard you hooked up with Kayla last night, how was it?
Todd: Dude, I think I'm in love. We had the best date of
my life, then we went back to my place and we were flobbing for hours.
Jason: Nice, I'm glad it went well