腕白わんぱく Common I-adj Noun English jmdict 1 adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) word usually written using kana alone naughty;mischievous;unruly あのわんぱく小僧のいたずらには閉口する。 That naughty boy annoys me by his pranks.