Simple past tense and past participle of scupper.(verb)
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Use "scuppered" in a sentence
"African Trade Unions and the South African Communist Party, which he said "scuppered" the government's bold bid and had neutralised"
"One because it recalls distant days when the Fifa general secretary praised English footballing philosophy, rather than being the man widely regarded as heading a corrupt organisation that scuppered England's chance of hosting the 2018 World Cup."
"The sudden scrapping of the Audit Commission last summer was rushed and could have scuppered meaningful reforms of local authority auditing, according to a report by the Commons local government select committee."