Acronym for "Situation Normal, All Fucked Up" (or, more politely, "Situation Normal, All Fouled Up"). Most often used as a noun, referring to an unfortunate and possibly urgent situation.
Originated among American G.I.s during World War II. See also FUBAR.
It's going to take some quick thinking to get ourselves out of this SNAFU.
A legendary underground computer hacker and programmer famed for his virtuoso talent and luscious ginger locks.
<luser> S.n.a.f.u. 0wn3d my network :(