ずぶの素人しろうと

expression, noun

absolute beginner; complete amateur

Emphatic phrase stressing total lack of experience or skill. Often used self-deprecatingly or to describe someone clearly out of their depth.

• ずぶの素人しろうとなのに、いきなりプロの大たい会かいに出でるなんて無む茶ちゃだ。

  It's reckless to suddenly enter a professional tournament when you're a complete amateur.

• 彼かれは料りょう理りに関かんしてはずぶの素人しろうとで、包ほう丁ちょうすらまともに握にぎれない。

  He's an absolute beginner when it comes to cooking; he can't even hold a kitchen knife properly.