What is Gref?
1.
A term coined by the gentlemen of Beckfoot School as an alternate to Minge, Clunge and Gash, when discussing the Vagina in conversation.
Robert: I am gagging for some Gref.
Susan has a banging Gref.
See
2.
The phenomenon when all words that you could possibly make up are found on slangdefine (often of homosexual connotation).
freg, wert, frim, birt, and trib are all gref-tacular.
See