The practice -- usually found in but not limited to comedies -- of attempting to sneak some manner of profanity or other forbidden material past the network censors. The trope name is a somewhat milder version of comedian Robin Williams's term for his attempts along these lines while he was on the air in Mork and Mindy; Williams has probably made the greatest (known) effort along these lines in television history, allegedly researching and exhausting several different languages in an attempt to find genuinely dirty words the censors would not recognize, and coming up with sequences that would seem utterly innocent on paper, but which would carry vast quantities of implied prurience -- often hilarious -- when executed.