Here are some possibilities for what the writer might have meant:
* "Smashed" or "crushed": This is the most likely meaning, especially if the context suggests something being flattened or compressed. For example, "The car was smunched in the accident."
* "Smudged" or "smeared": This could be the case if the context involves a stain or an unclear image. For example, "The lipstick smunched all over her face."
* "Smunched" could be a made-up word: Some people use unique words or expressions in their own personal vocabulary.
To understand the intended meaning, you need more context. What was the sentence or situation where you saw the word "smunched"?