[
LEW-nh] (n. f.) Car cuts you off: what a
lunatic! Guy wears plaid shorts with a striped shirt and cowboy boots: look at that
lunatic! Back in the 14th century when the word was coined, you had to certifiably, clinically nuts to be
lunatic—and also dependent on the changes of the
moon. Scientists thought there was a link between our satellite and certain insane folks, so they named the condition
lunacy after the French word
lune, which means
moon.