This term could have a few different meanings:
1. Refers to the act of sucking fuck juices.
2. Refers to the act of collecting fuck juices, adding a hardening agent, a little sugar and making a sucker and/or lollie pop.
3. Refers to a vampiric man/creature that sucks fuck.
4. A deraugatory term that doesn't make a whole lot of sense.
1. After have sex, the man goes down and slurps up the juices. Woman: "Yeah, you're bad little fuck sucker aren't you? Suck that fuck juice!"
2. "Want to go to the store and grab some fucksuckers?"
this is for the complete lamo that most likely doesn't have 2 brain cells to bounce together. If you think about a funeral procession, and how it takes a little bit of effort to keep it organized...now pare it down to one car, yes, just one car - the idiot him/herself.