Rainbow Head
A supposedly/known homosexual person who publicly condemns homosexuality, as if he/she walks around with a rainbow over his/her head that everyone can see but he/she still denies its existence
"This gay dude just called me a fag. What a rainbow head."
Rainbow Head
When a member of the (LGBTQ+) gives you a (blowjob)
Yo this lesbian gave me rainbow head the other day