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to be awesome in a sneaky and/or steathly way
"Dude, did you see me jack that paper from her desk? It was totally spy high."
by Ryan Ritchie January 21, 2008
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A high that you cannot grasp, but you know its there, somewhere, watching you.
A: "I feel high, but I'm not sure."
B: "Its a high that only spy's on you, a Spy High."
by Cu7 October 26, 2008
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