The full form of FUBAR is f##ked/fouled up beyond all recognition
The meaning of the widely used acronym “FUBAR” means that someone or someone is “f#$ked/fouled up beyond all recognition.” In other words, they or it is really messed up and/or not functioning correctly.

Origin of FUBAR

The acronym “FUBAR” is one of the acronyms that existed before the age of the internet and electronic communications. This acronym started being used in the days of World War II by the soldiers. As the usage of this military slang became popular and widely used among soldiers, it eventually grew beyond the military and spread into the public sector where it is still used today to describe a messed up situation or person.

Other Meanings
Although “FUBAR” generally stands for the phrase stated above in the meaning, the “AR” representation changes at random to mean other things according to users of this phrase. For example, “FUBAR” can also stand for “f$%ked up beyond all repair” or “f$%ked up beyond all reason.” The context of the sentence or conversation it is used at the time will help you to determine which phrase is meant by the acronym.

Example Conversations
An email exchange between and foreman and his manager.

Manager: I heard you were having some problems with the rollers on line 5?
Foreman: Yes, sir.
Manager: What is wrong with them?
Foreman: To me, it looks like something got caught inside of them and was torn to pieces and now the gears are all jammed up.
Manager: So, what you are telling me is its FUBAR.
Foreman: I am no mechanic boss but, yes, by looking at it I would think so.