Definitions by BanRanchTalk

ghaf 

Go Hard as Fuck. Can be used as an acronym or as a verb itself. Commonly used by snowboarders and other extreme sport bros.

"Dude, I'm going to drop in hot and ghaf on this pow."

or

"Brah, watch me ghaf on this ramp."

or simply: "Ghaf on the gnar."

ghaf by BanRanchTalk September 6, 2014