Dictionary / Vocabulary / 平々凡々
へいへいぼんぼん
very ordinary; mediocre; all-too-common; quite commonplace
Also written 平平凡凡
彼ほど平々凡々たる主人公は珍しい。
A protagonist as plain and ordinary as him is rare indeed.
さまざまな才能に恵まれて、なんでもそつなくこなす姉にとって、平々凡々たる俺の存在はひどく許せないものらしい。
For my multi-talented sister, able do anything with ease, it seems that my commonplace self is something whose existence she finds very hard to forgive.