Unusual Euphemism: Professional Wrestling aka: Pro Wrestling
In WWE, Kurt Angle and Booker T once had a Shout-Out to Die Hard when Booker asked Angle, "You really think you have a chance, Mr. Cowboy?" Angle's response: "Yippie-kai-yay, Mother Hubbard."
The independent wrestling company CHIKARA promotes itself as family-friendly and discourages foul language. This led to fans chanting "Holy Poop" after impressive moves or dives.
The Rock used a lot of these, notably using "pie" as a nickname for vaginas, and "strudel" as a nickname for penises.
John Cena, vocabulary constrained by WWE's new PG policy, has recently made "Elimination Chamber" a euphemism for "ass". Runs into Department of Redundancy Department when he starts talking about "kicking people's elimination chambers" and then going to the Elimination Chamber PPV and "kicking more elimination chamber".
Double Subverted. Contrary to popular belief, the word 'ass' can be and is said by John Cena and others in the PG era. He only did that in one or two promos Just for Pun... it would have turned into a Cluster A Bomb otherwise.
And: "BALONEY, FUDGE AND MUSTARD! MY LIFE IS BEING RUINED BY THE INTERNET!"