chief cook and bottle washer
One who is involved in many aspects of a particular situation. Because so many people have left our department recently, I'm the chief cook and bottle washer, doing every little task that comes up.
chief cook and bottlewasher
A person in charge of numerous duties, both vital and trivial, as in We have no secretaries or clerks; the department head is chief cook and bottlewasher and does it all . [Slang; c. 1840]