You can keep your Allan Shermans, your Cheeches (as well as your Chongs), and your Pardon My Bloopers (Volumes 1 through 7). None of them hold a candle to this gem when it comes to determining the worst comedy album of all time. Unkie Dunkie was a butcher who lived right here in Jersey City and was such a cutup that he went and recorded an original LP of his comedic stylings. His material focuses on his no-account nephew Mortimer, but it's the monotonous English-As-An-Unknown-Language delivery and the non-stop laugh track and rimshots that really put this one onto the history books. But hey, this is just my opinion.
And if you enjoyed Unkie Dunkie, don't forget about Aunt Pearl and John Daker.
Thanks to Andru for the original find, Kenny G for the burn and Megan for the scan.