- grew in usage rapidly in arts and hipster scenes from the March/April 2011 video meme "Gravy Rainbow" from the music video of the same name by New Zealand Electropop artist Disasteradio
Girls on the beach /
Well all they want is a Gravy Rainbow /
They do the Mashed Potato on the Gravy Rainbow
The fecal mustache that is created when a person performs fellatio on their partner after their partner has pitched during anal sex (Ass-to-Mouth).
Although possible in heterosexual encounters, the term Rainbow indicates that it is primarily a homosexual term.