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.
: The husband and wife were ''smurfs,'' a type of drug-money launderer. A husband-and-wife smurfing team will travel from bank to bank, posing as strangers
: To avoid being reported by banks, criminals often make numerous deposits of slightly less than $10,000, a practice known as smurfing (1980s+)