rainbow neck 

A homosexual redneck. A hillbilly who is part of the LGBT+ community.

Those dang rainbow necks with their moonshine and drag shows are sure loud!

rainbow neck by TDCAMP January 21, 2020

rainbow necker 

A person who performs cunnilinctus on a menstruating woman. (see also rainbow kiss)

"Oh yes, my Phillip is a rainbow necker" said Elizabeth proudly.

rainbow necker by Dunky Oggins November 19, 2003