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used allusively from 1985, in reference to John Rambo, hero of David Morrell's novel "First Blood" (1972), popularized as portrayed by Sylvester Stallone in Hollywood movie version (1982), a U.S. Vietnam veteran, "macho and self-sufficient, and bent on violent retribution" [OED]. The family name is an old one in New Jersey and Pennsylvania, originally Swedish, sometimes said to represent Swedish place name Ramberget, or to be from French Huguenots who took refuge in Sweden.
Violent; loutishly aggressive: Each day Bush ratchets up the Rambo rhetoric and closes more alleys of diplomatic escape for Saddam Hussein
[1985+; fr the main character of the movie Rambo]