The muffled, indecipherable joke that took showrunners a “long time” to pen was revealed by a show fanatic on Twitter.

The boy has replaced his teacher's birth control pills with Tic-Tacs, nearly killed his mother with a log when she briefly became his teacher, used Homer's (Dan Castellaneta) credit card without him ...

The Simpsons can pull on the heartstrings with its saddest episodes, from "Mother Simpson" to "Lisa's Substitute." ...

With the help of audio processing, a diehard The Simpsons fan has unearthed never-before-heard audio — and, in turn, revealed another joke.