batty, shame on your
Racist song, presumably sung by Africans to Indians. Shame on your batty, 'Cos your batty smells of curry. Let me smell (sniff sniff) Bloody hell!
written by Pe*e Mo*re, approved by Log

Also consider "Shame on your batty when your batty get fresh". Not sure what it meant, but rolled nicely off the tongue (not that an actual batty has ever rolled off, or on, my tongue you understand - that would be hideous).
written by Du*t *hee*s, approved by Susan

In my primary school it was the slightly less racially motivated:
Please Mrs Murray,
Does your bum smell of curry?
Let me smell (sniff, sniff),
Bloody hell!

The sniff wasn't pronounced, you just inhaled sharply through the nostrils. We had a teacher with the surname Fettis; his bum may have smelt of lettuce. Which isn't much of an insult, really.
written by Du*t *heets, approved by Log