Greybies 

Population of children born 9 months after the release of the Shades of Grey books.

"There are so many Greybies named Christian"

Greybies by Elinor G. December 15, 2012

Greybits 

A word to use out loud between friends when they are encountered by a large breasted woman. A short for "Great Big Tits".

(As well endowed woman approaches)
Tom: Have you seen the greybits around?

Greybits by dzier February 9, 2007

greybisexual 

A bisexual person who is only rarely sexually attracted to a man or a woman.

Did you hear Jack is greybisexual?

greybisexual by Jack and Cole July 12, 2018