"My brother is a tired accountant."

Translation: أَخي مُحاسِب تَعْبان.

[_FiX_]

This is the problem with using dialect.
When the word تعبان is used in dialectical usages (like in Egyptian) following a job description, it means colloqially that this person is bad at his or her job.

In proper Arabic:
My brother is a tired accountant'
أخي محاسبٌ متعَبٌ.

[antonmo]

mota3ib is included as a translation of tired in the msa dictionary. but contradicting when colloquial Egyptian uses it for another meaning.

[UsamaFoad]

That mean "My brother is a bad accountant" too