gnarl ‧ y /ˈnɑːli $ ˈnɑːr-/ BrE AmE adjective
1 . a gnarly tree or branch is rough and twisted with hard lumps SYN gnarled
2 . gnarly hands or fingers are twisted, rough, and difficult to move, usually because they are old SYN gnarled
3 . American English spoken a word meaning very good or excellent, used by young people:
‘Look at the size of that wave.’ ‘Gnarly!’
4 . American English spoken a word meaning very bad, used by young people:
a gnarly car wreck