間抜け

na-adjectiveまぬけ · manuke

1. Englishstupid; foolish; idiotic; inane

   • あいつはクラスでいちばんのまぬけだ。He is the dumbest kid in the class.

2. Englishfool; idiot; blockhead; half-wit

Source: JMdict (EDRDG) · CC BY-SA 4.0 (EDRDG)