Simple past tense and past participle of sandbag.(verb)
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Use "sandbagged" in a sentence
"Kuchta's lawyer, Kyle Schonekas, said the panel "sandbagged" his client."
"Joseph Mailander writing at Street Hassle was correct to say that Draper's protocol concerns "sandbagged" the No on B efforts."
"He started to give an absurd speech about how offended he was by the word "sandbagged" and how there was such a thing as courtesy and "noblesse oblige" and that the board deserved to hear the school district out."