Fiddlestick

"The error in his speech was just a fiddlestick, he continued on with the presentation."

"He thought the missing pen was just a fiddlestick, until he realized it was his lucky pen."

"She considered the issue to be a fiddlestick and didn't give it much thought."

"The politician's excessive use of 'fiddlestick' during the debate made her seem less confident and articulate."

"It's not that I don't believe you, fiddlestick, but I need to hear more evidence before making a decision."