1. SNAFU - Situation Normal, All Fucked Up - Thing are running normally.
2. TARFUN - Things Are Really Fucked Up Now - Houston, we have a problem.
3. FUBAR - Fucked Up Beyond All Recognition - Burn it to the ground and start over from scratch; it's totally destroyed.
Originated among American G.I.s during World War II. See also FUBAR.