Top Definition
When someone is performing a rim job and simultaneously giving a handjob. At the moment of ejaculation, the thumb of free hand slides into the chocolate starfish.
"This freaky chick is giving me a Rusty Trombone like a jazz legend, but then she flips the script and turns it into a Rusty Thumboni. Now she's my wife"
by annoyasaurus November 22, 2013

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