Simple past tense and past participle of blunder.(verb)
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Use "blundered" in a sentence
"BILL SCHNEIDER, CNN SENIOR POLITICAL ANALYST: Well, Carol, it was the gaffe of the week and maybe the campaign when John Kerry made what he called a blundered joke about President Bush, which came out as an insult to U.S. soldiers in Iraq."
"You seem to have blundered from the “irrational unrelated ramblings†thread onto the discussion about global warming."
"You seem to have blundered from the “irrational unrelated ramblings” thread onto the discussion about global warming."