Simple past tense and past participle of jinx.(verb)
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Use "jinxed" in a sentence
"Their comments and questions have encouraged me to do some research and write follow-up columns about two of the teams I "jinxed" - the four-man softball team, the King and His Court, and the Harlem Globetrotters basketball team."
"“That name jinxed it, if you ask me,” McCoy continued with a smirk."
"But I must agree with "jinxed" below, it's a war that has been going on for decades now."