Fiddlestick

"The missing button on his shirt was a fiddlestick, he wore it anyway."

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

"The stain on his shirt was just a fiddlestick, he had more important things to worry about."

"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."