Adverb (fukushi), Suru verb, Na-adjective (keiyodoshi), Noun which may take the genitive case particle 'no'
tousled; shaggy (hair); scraggly (beard); dishevelled; disheveled; unkempt
Onomatopoeic or mimetic word
その少年の髪は金髪でもじゃもじゃだ。The boy has a shock of blond hair.
Also written モジャモジャ