Where does the expression like a originate?

You're likely asking about the phrase "like a..." which is used to compare something to something else. It's not a specific expression with a known origin, but rather a common grammatical structure used in similes.

Here's how it works:

* Simile: A figure of speech that compares two things using words like "like" or "as".

* Structure: "Like a" is the beginning of a simile, followed by the thing being compared to.

Examples:

* "He's as strong as an ox."

* "She dances like a butterfly."

* "The room was quiet like a tomb."

The use of "like a" in similes is very common in English and other languages, making it difficult to trace its origin. It's simply a natural way for people to express comparisons and create vivid imagery.