What does strong as a horse mean?

"Strong as a horse" is an idiom that means extremely strong or powerful. It's used to emphasize someone's or something's physical strength, often in a humorous or exaggerated way.

Here are some examples of how it can be used:

* "My grandpa is strong as a horse. He can still lift heavy furniture without breaking a sweat."

* "The new truck is strong as a horse. It can tow anything."

* "She's got a will of iron and is strong as a horse. She'll get through anything."

It's important to note that the idiom is not meant to be taken literally. Horses are indeed strong animals, but the phrase is used to exaggerate the strength of a person or object.