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1.
A slang term describing thick and excessive amounts of vaginal pubic hair.
When having intercourse with that fine maiden, it took hours just to get through all her coaf.
by Ari S. November 25, 2006
 
2.
Cock Of A Fiend, commonly known as the most horrid of all derogatory terms, and insults. Being branded as a coaf is usually life threatening in nature (90% fatal) being known as a cock of a fiend is quite possibly worse than going to hell.
"Don't make me fucking do it man.... i dont want to have to go to far with this..."
"Don't say it man....please....i dont deserve it..."
"nah fuck that shit, your a fucking coaf you hear me? OI FUCK YOU COAF"
by Reid & Jono December 03, 2007