backroom boy
 

* 1.an expert adviser involved in making important decisions but usually lacking official status

English Related Words* a boy

* a boy servant

* a slip of a boy

* a wisp of a boy

* all work and no play makes jack a dull boy

* altar boy

* average boy

* back room boy

* backroom

* backroom, backoffice

* bad boy

* ball boy

* bar mitzvah boy

* barrow boy

* bat boy