In Reply to: Re: Doesn't that just jar your tomatoes posted by ESC on June 14, 2008 at 10:23:
: : Does anyone have info about, "Doesn't that just jar your tomatoes?"
: I've never heard that. Kind of along the lines of, "Doesn't that frost your cookies." Or "rattle your cage." The image that I get is home-canned tomatoes in glass Mason jars on a shelf in the cellar. If someone knocks up against the shelf, the glass jars clank together.
Since the expression seems to have humorous intent, perhaps it is a play on the meanings of the verb jar. One is "to put in a jar," which is what you do when you can tomatoes. The other is, as ESC has noted, to knock up against.
And I've never heard the expression either.