新人のくせに社長に意見するとは、身の程を知れ。
You're just a new hire and you're lecturing the president? Know your place.
身の程をわきまえずに大きな借金をしてしまった。
Forgetting my means, I ran up a huge debt.
彼は身の程知らずにもプロの選手に勝負を挑んだ。
He had the nerve to challenge a professional player, not knowing his limits.