Well, the urban dictionary defines "fras" as a leech or freeloader. So I guess "sassyfras" would be a cheeky guest who overstays his/her welcome and cleans out your fridge.
"Fra" is the prefix given to an Italian friar or monk. And sassy is kind of cheeky. So sassyfras would be a group of Roman clerics with a lot of chutzpah.
Here we go ! ;)
Sassafras tea!
To me sassyfras is something along the lines of a code word..... "Kiss my sassyfras!" LOL!