Rusty Milkbox Ukulele

The opposite of the Rusty Trombone, in which the recipient is female. Basically, the male (or female) licks the receiving girls asshole while fingering her.

Man, she gave me a Rusty Trombone so I had to return the favor. I spun that bitch around, got down on my knees and gave her a Rusty Milkbox Ukulele.