What it means
Used when something is rough, wild, intense, or stupidly impressive. It can swing good or bad off your tone. A gnarly wave might be heavy and sketchy, a gnarly trick might be disgustingly clean, and a gnarly injury is just plain nasty. It started in surf and skate talk and spread into everyday slang for anything hectic.
Usage examples
"Did you see that set roll in? First wave was gnarly, then he ate it hard, popped up laughing, like it was just another Tuesday."
"That was a gnarly wave, it knocked three surfers off their boards in a row."
"He took a gnarly fall off his bike but somehow walked away with just a scratch."
"That trail got gnarly after the rain, full mud, loose rocks, and one bit that nearly launched me into a bush."
"Bro, that frontside air was gnarly. Whole park made that stank-face noise when you landed it."
Where it comes from
Gnarly comes from gnarled, the older English word for something knotted, twisted, and rough. In US surf slang, especially in California, it got picked up for harsh, dangerous conditions like heavy waves, then spread through skate culture and wider slang to mean anything intense, rugged, or insanely impressive.
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