Female version of the rusty trombone, where a woman bends over allowing a guy or girl to tongue the woman's anus while reaching up through her legs and fingering her clitoris.
All Beth has to do is bend over and say, "Time to play that rusty accordion."
The act of performing fellatio while tickling or fingering the anus
That chick was giving me head, then all of the sudden she put a finger up my bum. She was playing the Rusty Accordion
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