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A term commonly used amongst recreational drug users to describe an extremely potent form of the tranquiliser ketamine. The effects of large intakes of this substance can range anywhere from a desire to listen to extended periods of fleetwood mac, sitting around in cardboard boxes, and inevitably, getting lost in the k-hole. Watching people partake of Bulletproof Ket is, prehaps not unsurprisingly, a great deal of fun.
Did you see Nik after his third line of that Bulletproof Ket? I've never seen someone having it out with an imaginery bathroom dwarf before.
by Ketaloco February 12, 2007
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