Top definition
n. When a younger homosexual man is penetrated from both ends (e.g. spitroasted) by two considerably older gentlemen.
"Bruce and Peter sure gave Steve the ol' rusty rainbow Friday night at Cameron's Audrey Hepburn party. I heard they broke the handicapped toilet bar and were snorting crushed viagra off Steve's back!"
by dcdenizen May 08, 2016
Get the mug
Get a Rusty rainbow mug for your buddy Rihanna.