Terms for subject Humorous / Jocular containing department

English	Russian
is your department	это по вашей части ("Now, Watson, the fair sex is your department", said Holmes, with a smile, when the dwindling frou-frou of skirts had ended in the slam of the front door. – Sir Arthur Conan Doyle ART Vancouver)
kitchen department	группа ударных инструментов (в оркестре)