A medication prescribed by disgruntleddoctors for patients who insist that they need to been seen for the slightest piffling cold.
"Hello Mr Smith, I see you have the sniffles again. Take one fuckoffacillin three times a day for five days and you'll feel much better. If you need to come back, make sure it's on a Friday, I don't work on Fridays".
An easier way to say "Fuck off and die". Created especially for intelligent people, in effort to make scolding one of the many surrounding fucktards (see "fuctard" in Urban Dictionary) a tad bit less tiring. The funtional difference being less syllables to pronounce therefore saving precious breath that could be used more productively, especially in the presence of the above forementioned fucktards that require such a statement in the multitude and at a frequency greater than every 30 minutes or less.
Dick: Hey Harry can I borrow your phone to call my wife?
Harry: But you just got off of my phone talking toyour wife didnt you? Ask Tom if you can borrow his.
5 min later:
Dick: Harry is it ok if I borrow your phone to call my wife?
Harry: Fuckoffdie!