Original from 70's surfspeak - to describe waves that are violently breaking without the form that would render them more rideable. Can also describe less than ideal females.
"I'm bailing on this session-waves are too gnarly" "I had to ditch her friend, she was lookin' gnarly"
by Darrell Hawkins November 24, 2002
adjective; used to describe anything really far out and amazing, not necessarily lovely; an extraordinary stunt, or event. Also, onomatopoeia.
"That was/is SO gnarly!"
by Jessica February 16, 2004
by Gnarly Wear Dude March 16, 2006
by toocoolforyourmomma November 24, 2009
by don b February 28, 2007
by Eazy eeeeeee August 19, 2006