What does chicken placed in mattress mean?

There's no common or widely accepted meaning for "chicken placed in mattress." This phrase is likely not a common idiom or saying.

Here are some possible interpretations, depending on the context:

* A strange or nonsensical action: It could be used to describe something completely illogical or absurd, like a surreal dream or an unusual joke.

* A metaphor for hiding something: The chicken might represent something that needs to be concealed, and the mattress could symbolize the place where it's hidden. This could be a metaphor for secrets, fears, or anxieties.

* A specific cultural reference: It's possible that this phrase has a specific meaning within a particular culture or subculture.

Without more context, it's difficult to determine the intended meaning.

If you can provide more information about the context of this phrase, I might be able to give you a more specific answer. For example, tell me:

* Where did you encounter this phrase? (e.g., in a book, a movie, a conversation)

* What was the surrounding text or conversation?

* What do you think it might mean?