NPR's guide to the running gags from the show.
Lucille keeps a rape horn for her protection.
5 episodes feature this joke:
Tobias "got blown" by Lucille's rape horn.
The rape horn bleeps out Buster's words as he is knocked out with ether.
Sources: Joke data compiled by Adam Cole / NPR. Episode metadata from The TVDB via a Creative Commons Attribution 3.0 United States (CC BY 3.0 US) license.