rainbow kiss

From rainbow +‎ kiss, possibly in reference to the various mixture of body fluids, like the various colours of a rainbow. Alternatively, from a new application of an older term that involves kissing one's ear, then mouth, then alternate ear thus tracing an upside-down ark, or rainbow formation.

rainbow kiss (plural rainbow kisses)

1. (sexology, vulgar) The act of someone performing oral sex on a woman during her menstrual period while also simultaneously receiving oral sex from her, followed by a kiss where male ejaculate and menstrual fluid are exchanged via kissing, then usually swallowed.
   • 2010, Emmett James, Admit One: My Life in Film, page 63:

     Their beautiful romantic stories went something like this: “Do you know what a rainbow kiss is? Because girls love it, they gag for it, and you have to give it to them.”

   • 2010, James McConnachie, The Rough Guide to Sex:

     Kissed exchanges of period blood (the “rainbow kiss”) and sperm (the “snowball”) are probably acquired tastes.

   • 2018, Fiona C. Chambers, ‎Anne Jones, ‎Orla Murphy, Design Thinking for Digital Well-being:

     On top of this, it was getting out of control with everything being recorded by one of the guys who had kept posting on Instagram and Snapchat, so that others from the party could come and watch as well. The final challenge was the Rainbow Kiss. This involved the three girls performing oral sex on one of the boys. As one of the girls started to do this, Becky's mother walked into the room.

   • 2022, Tony Kelbrat, A Love-Romance-Wedding-Marriage Guide:

     A rainbow kiss is when a guy eats out a menstruating girl then kisses her on the lips.