いちげんこじ· also いちごんこじ
person who is ready to comment on every subject; ready critic
Noun
また、お説教せっきょうが始はじまった。一言居士いちげんこじの面目躍如めんもくやくじょというところだね。
Uh-oh, here comes another lecture. This guy likes to show he has something to say about everything.