A slur for white people that has a dash of homophobia to maximize personal insult be the person gay or straight.
"Hey, check out Neil Patrick Harris and his husband singing in an acapella group. Have you ever seen anything whiter or gayer for that matter?"
"Their matching unicorn sweaters come in at a close second. What a pair of MAYOGAYS"
"Jinx!"
Just a fun slur to disparage a white person who may or may not be gay. Doesn't matter, as long as it's insulting.
"check out the Mayogays. Nice plunging V-neck shirt dude, really accentuates your girlfriend's penis."