Dictionary / Vocabulary / 三日坊主
みっかぼうず
person who cannot stick to anything; unsteady worker; monk for three days
Also written 三日ぼうず
彼は何事でも三日坊主だ。
He can't stick to anything very long.
新しくブログを始めた。三日坊主にならないようがんばるぞ！
I started a new blog. I'll do my best to keep it going.
彼は何もかも三日坊主だ。