Simple past tense and past participle of highjack.(verb)
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Use "highjacked" in a sentence
"Adams accuses dissidents of hijacking republican movement | BreakingNews. ieThe only thing dissidents have highjacked is Irish peoples vehicles which they burn on the side of the street."
"Even if Hillary had those 4 'highjacked' delegates – more generously - even if she got Michigan's delegates and Obama got none, Obama would still be ahead and would most likely cross the finish line on Tuesday."
"OpEdNews could never be "highjacked" by any faction, there's far too many different people and positions represented here to justify such a concern."