Your flies are undone.....
From the episode where Mr. Mash delivers what is known as Naughty Knickers (or Knaughty Knickers?).
When he says what is on each of them, when it comes to Your Flies Are Undone, for some reason, it made me laugh right out loud!
Joker's Wilde
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Buddy Burger. Have us scrape one off the grill..so YOU don't have to scrape one off the road!