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1.
To come close to winning, only to fail at the last moment.
An "Also ran" destined to failure, often possessing inferior genitalia, generally of austrailian origin.
Hell's Kitchen: Grand final;
"Well your souffle is divine, in texture, flavour and appearance,but you've burnt the fucking chips and completely bushpigged it"
by Trialsmaster December 17, 2009
 
2.
To fail, despite all promise and assurance of victory. To fall at the final fence, generally relating to female encounters.
"That little Asian bird was all over you in the pub - Did you get the ride?"

"Did I fuck, her ugly fat mate completely Bushpigged it by dragging her home in a taxi"
by Platinum meddler December 19, 2009