Its and actual registered tradmarked corporation, consisting of Energy drink, clothing line, that caters to extreme sports. There roots are deep in the sportbike relm of motorcycle stunting.

They have use their name as a terminology for the burst or rush of energy or adrenaline dump you get when attempting or preforming something extreme, death defying, insane or just going big.
After I wiped out on the biggest wave of the day I felt like I lost my Stunt Juice!

Or you must of been drinking that Stunt Juice to pull that off.
by Stuntjuice November 24, 2009

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