This couple name is even used by the fans in real life to describe a relationship that isn't really understood or clear.
Even though the word looks a lot like "FUCK" it doesn't mean anything like it, but the fans may use "FrUK" to replace it when swearing.
-Darn it, can't Julia stop refusing Jack's invitation? She told me she liked him though... what is it? a FrUK relationship or what?
- FrUK it! That history exam was like too complicated, man!