The gayest one of them all is simply exactly how it sounds, One who is gayer than anyone else
“Danny… I hate to break it to you. But your the gayest of them all. That means that your gayer than me, so there for your the gayest one of them all.”
This is the phrase that is used when "no u" fails.
"Ur mum gay." "No u" "Well your mum gayest" *other person dies*
2 spaccas known as toby and misi
“oh fuck, the gayest people alive are here again”