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I have to wonder how much of the "Real Life" section* originally typed "x" at a predictable point is not this but rather That Came Out Wrong and/or Have a Gay Old Time. Isn't the difference between this and the former intent?
The thought occurred to me while reading the entry regarding the Tea Party and Fox News. I strongly doubt that people to whom the pothole could be applied would utilize Double Entendres intentionally (with the exception of Rush Limbaugh and others who bill themselves as part commentator, part "entertainer").
EDIT: Added one more pothole...
Deleted this barely-intelligible, natteriffic part of the Harvey Birdman example:
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How well does it match the trope?