Etimología y Historia de D.A.

also rat-fuck, ratfuck, c. 1956 as "hijinks or trouble, especially in a campus setting," according to American Speech (October 1965) where it was said to be "a widely used slang term at Stanford" and often abbreviated "R.F." (Compare D.A. from around the same era.) Perhaps it is related to slang rat fink, which emerged about the same time.

Specifically as Philadelphia rat-fuck for "a big, elaborate, and really terrible social event."

This sort of event has a name, coined by the late Marie Harriman, the dazzling second wife of statesman Averell Harriman. It is called a "Philadelphia rat fuck"—"P.R.F." or "rat fuck" for short. (This is definitely a challenge for the illustrator of this book.) [Sally Quinn, "The Party: A Guide to Adventurous Entertaining," 1997] 

Nombre propio masculino, abreviatura de Anthony. Tony Curtis, como un estilo de corte de cabello masculino (generalmente con un D.A. en la parte trasera), se populariza en 1956, a partir del nombre artístico del actor de cine estadounidense Bernard Schwarz (1925-2010).