"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
1. According to South Park, the name black people gave to their house after white people started saying da house, da hizzie, da hizzie fo shizzie, and now, the flibbity-flobbity-floop.
2. Hopefully, the name of my next pet/child.
3. My new legal name.
1. Chef: We had to change it because whit people started saying da house, then they said da hizzie, and then they said da hizzie fo shizzie, so now we call it the flibbity-flobbity-floop.
Mr. Garrison: Quick Mr. Slave, we have to get back to our flibbity-flobbity-floop!