Floccinaucinihilipilification, derived from Latin, has the distinction of being one of the longest words in the English language. It essentially is used to describe something as worthless or having no value.
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Need an example sentence? In 1995, former US President Bill Clinton's press secretary Mike McCurry said: "They happen to produce huge billion dollar differences over seven years in the federal budget, which is why they become fairly incendiary as the debate goes along. But if you—as a practical matter of estimating the economy, the difference is not great. There's a little bit of floccinaucinihilipilification going on here."