boshkin, from the name of a very beatiful lady.
1. v, to fuck up something which was a certainty
2. n, Something which was a dead cert until blown out of the water, through no fault of your own, by extraneous circumstances.
1. "Man, I can't believed you boshkinned that hottie by getting your wanger out."
2. "That horse was a boshkin. Who would've thought with those odds that its arse would prolapse mid-race?"