brain truster
noun
a member of a brain trust; an important but usually unofficial adviser.
Origin of brain truster
First recorded in 1930–35;
brain trust +
-er1
Words nearby brain truster
brain scan,
brain someone,
brain sugar,
brain swelling,
brain trust,
brain truster,
brain up,
brain wave,
brain's reflex,
brain-fever bird,
brain-picking