I'm a big fan of Primus (a friend into bass introduced them to me in 1988. When I heard them used on South Park, I couldn't believe it/was thrilled)!
But if you are going to play a song called "My Name is Mud" to a muddy Woodstock audience (after the rain, everyone is covered brown and enjoying a large friendly mosh-pit in front of the stage)... 1. you should wear a poncho for the song 2. not play the song in the MIDDLE of your set, consider it at the end.
PS- Here is the video. I don't hear OP's quote. What I hear is, "Boy I opened a big-ass can of worms with that one, didn't I?! The song is called 'My Name is Mud', but keep the mud to yourself, you son-of-a-bitch (said in a playful tone)." (They use "son-of-a-bitch" in lyrics too, so not as angry as you might imagine.) And they carry on without any problems.