馬ば鹿かにできない

expression

not to be underestimated; not to be trifled with

Used when someone or something should be taken seriously, often because they have hidden strength, skill, or importance. Literally 'cannot be made a fool of'.

• 彼かれの実じつ力りょくは馬ば鹿かにできない。

  His ability is not to be underestimated.

• この問もん題だいは馬ば鹿かにできない。

  This problem is not to be taken lightly.