My favourite 'diss track' is off scary movie when the killers rapping:
I'm gonna slash and gash, rip another hole in your ass. I'll smear blood on the walls and then play tennis with your balls, and if the phone rings dont answer the call. Im gonna slit yo' thraot, fuck u like a goat.
I'll rip yo' fore skin off and make a winter coat. PEACE!'
I'm not sure what a 'diss track' is but that is pretty cool^