Fubar is a terminology used during World War II to describe a mission that had been severely messed up or an event that was complete chaos. A mission that is coined this usually had a terrible outcome that led to many being killed.
Some people and soldiers even still use today, usually War veterans.
In The FilmEdit
There are two meanings. They are:
Fouled Up Beyond All Recognition (clean version).
F**ked Up Beyond All Recognition (what the army commonly meant it to be).