Ultracrepidarian

Ultracrepidarian (uhl-truh-krep-i-DAYR-ee-uhn) Adjective: -Talking about things beyond the scope of one's knowledge. Noun: -A person who gives opinions and advice on matters outside of one's knowledge. Use instead of: -Braggart -Know-it-all -Smarty Pants -Windbag This word was coined by the essayist William Hazlitt in 1819. From Latin ultra (beyond) + crepidarius (shoemaker), from crepida (sandal). Earliest documented use: 1819. Used in a sentence: "There is nothing worse than an ultracrepidarian going on about something they’ve never done or experienced, but that they insist they've read several informative articles about on the Facebook."