How Well Do You Know English Slang?
1941, U.S. military slang, acronym for situation normal, all fucked up, "an expression conveying the common soldier's laconic acceptance of the disorder of war and the ineptitude of his superiors" ["Oxford English Dictionary"]. As an adjective from 1942. In public explanations the word typically was euphemised to fouled.
: It's a very snafu set-up herenoun
: He gave it a good shot, but snafued horribly
[WWII armed forces; fr situation normal, all fucked up]