Hi, 1. As an acronym WASP can stand for many things - it depends on the context. Have a look at: http://www.acronymfinder.com/ 2. I looked up hijack in my dictionary, but all it says is that the word is American, of uncertain origin.
WASP is usually interpreted as 'white Anglo-Saxon Protestant', meaning (for some reason) the average American.
HIJACKER -- '1923, Amer.Eng., from high(way) + jacker "one who holds up." Originally "to rob (a bootlegger, smuggler, etc.) in transit;" sense of "seizing an aircraft in flight" is 1968 (also in 1961 variant 'skyjack'), extended 1970s to any form of public transportation.'