Dumb as a Rock
First Usage: This phrase was first used in the late 1980s in New England, though the original meaning was different. Critics of George H.W. Bush's plan to start the Gulf War started referring to other things as, "Dumb as Iraq."
Evolution: Southerners adopted the phrase, but with their relaxed accents turned the saying into the one we know today.
Archaic Usage in a Sentence: "Man, signing Tim Tebow when he hasn't played in the NFL in six years is stupid. The Jaguars are dumb as Iraq."
Back to the Drawing Board
First Usage: Though the wording hasn't changed since this saying's first use in the 1500s, its meaning has flipped entirely. Leonardo da Vinci used this phrase in response to critics who suggested he make edits to his artwork. He refused and would literally turn his back to the drawing board.
Evolution: As the saying was translated into English in the 1600s, the British began using the phrase in its modern format, meaning to continue to work on something.
Archaic Usage in a Sentence:
"All of these fossil fuels are really hurting the environment, but I'm up for reelection this year and fixing things would be expensive for the tax payers. What should I do."
"You should go back to the drawing board."
"You mean I should ignore the problem? I agree. Thanks for your help!"
That's the Last Straw
First Usage: Originally, this phrase referenced a camel carrying straw. Even though straw isn't heavy, eventually an additional piece of straw will break the camel's back. The expression is used to refer to someone's patience running out because of a series of minor annoyances.
Evolution: Today, the saying has lost much of it's meaning and is used more literally.
Modern Usage in a Sentence:
"Hi, I'd like to order a soda."
"Sure thing. Here you go. You're lucky you arrived when you did, because that's the last straw."
Mega Douche
First Usage: Although French obstetrician Maurice Eguisier invented the first douche in 1843, the plus-sized model of the female health instrument wasn't released until seven years later.
Evolution: Over time, the term changed from a purely scientific description to slang for someone that's terrible.
Modern Usage in a Sentence:
"Did you see what Marjorie Taylor Greene did to Alexandria Ocasio-Cortez? She's such a douche."
"I disagree."
"You do?!"
"Yeah. I think she's more of a mega douche."