to almost do away with, or almost put an end to. Quite similar to the word "squashment," just not rising to the same level of severity.
The investigative reporter, by getting pinned to the gate while filming the drug lord's van enter the compound, was lucky she only suffered a little squishment when the driver stopped in the nick of time when she screamed, then backing up...another two or three feet or so, and that reporter would have been yet another example of squashment.
When a drunk old man takes his schlong out and rams it into a window while yelling out the phrase "Squished tadpole! Squished Tadpole!" Often done while over consuming cheap and hard alcohol.