Question: What did Mary mean when she told Jack that Martin squished?
Answer: I think she was inferring he had "wet farts." We hear him passing gas, but if it was more... depository than that, it would definitely be more genteel to say he "squished..."
Answer: She was referring to his habit of excessively passing gas (farting) He can be heard doing this early in the film, even though he is a ghost.
raywest ★