After 15 accidents in 4 miles, the driving instructor said to the student, I don't know which is more FUBAR, you or the car.

Like when you try to save some money on a tune up and, in the process of doing it yourself, break your distributor body and, in the process of putting in a new distributor got the timing all out of place so the car won't run and breaks down twenty miles from home in the middle of the night. In that instance you would tell the towtruck driver "Well, I guess I fubar'd that damn thing (At least that's what I told my tow truck driver when I did it).

anything to do with the military is fubar

Did you see that accident? That car was totally fubar'd

Man I was drunk last night, I was so fubar'd I passed out in the driveway.

(a) Bob: I'm way gone is that chick alright lookin'?
Ted: Woah, stay back she's FUBAR!

(b) Fred: How ya' feelin' this morning sparky?
Jim: I...am...FUBAR.

We got our asses handed to us out there. This plan was FUBAR from the beginning.

You are completely fubared, my friend.