The ATOs at my school do the asshole song as well.... they have a verse for all the other fraternites, but I only remember two...
I'm's an asshole through and through
But's I'd rather be an asshole than a Signma Alpha Mu
I'm an asshole till I die
But's I'd rather be an asshole than a f***ing Delta Chi
So on and so forth... They also sing a quite raunchy one on the quad that I shouldn't post here
As for teh other fraternities... generally when they sing the songs, they're too wasted to enunciate so you hear "Blah blah blah muh kkkfat PHI SIGMA KAPPA guh blah hah!"