Do yourselves a favor... go to YouTube and find this group and watch their videos. There's a bunch of them performing live and they are HILARIOUS. By far my favorites are "Business Time" and "Frodo, Don't Wear the Ring". Both have an actual music video, but be warned the Business Time one appeared to have briefly shown one of them nude, but blurred out, so you may want to just look for their live performance (although the lyrics kind of vary so the actual video is funnier in my opinion). And the Frodo one is only hilarious if you've seen the LOTR movies (Lord of the Rings). Soooooo freakin funny people. Please, seriously, if you need a good laugh, you will die of laughter. And if you don't, you're dead inside.
Oh, and if you haven't seen Achmed the Terrorist, look for that on YouTube too. It's a vantrilliquist performance that is ridiculously funny.