Adjective
-
frenzied as if possessed by a demon
"the soldier was completely amuck"
"berserk with grief"
"a berserk worker smashing windows"
Adverb
-
in a murderous frenzy
"rioters running amuck and throwing sticks and bottles and stones"
-
wildly
without self-control
"when the restaurant caught fire the patrons ran amuck, blocking the exit"