It’s a Charlie Parker tune. Camarillo is a place in California where there is a mental hospital. CP spent some time there to help with his addiction to narcotics.

Frank Zappa rhymes it with brillo. Steely Dan (in an explicit reference to CP) with armadillo.

I know a Scots lady who is a mental nurse who emigrated to California and ended up working at Camarillo.

Thanks for the question:)