The following episode of Cow and Chicken aired once in 1998, before being banned from the air. It is called "Buffalo Gals" and it is pretty much exactly what you think a children's cartoon making fun of butch lesbians would look like. While I don't think it is outright offensive -- it's a big, dumb caricature, not a Jack Chick tract -- I am really, really amazed that this managed to get aired even once. I'm also fascinated with the episode because while there are plenty of examples of fey gay men on TV -- kids' shows or not -- you rarely get to see the bruiser-dyke trope.
Also, please turn off the, ah, helpful comments the uploader felt were necessary.