Think you're a linguist with a tongue made of pure gold? Try THIS out, big guy.

Scientists at MIT believe they've created the world's HARDEST TONGUE TWISTER. They engineered it based on their research into which phonic combinations cause people the most difficulty.

And the result is: Pad kid poured curd pulled cod.

One of the researchers says, quote, "If anyone can say this phrase 10 times quickly, they [deserve] a prize."

It's true . . . it's REALLY hard. You'll be begging for the sweet, simple relief of "she sells seashells by the seashore."