idea hamster

idea hamster

or

ideas hamster

n
slang a person who is employed as a source of new ideas
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
idea hamster: Someone who always seems to have his or her idea generator running.
Other notable new entries are bangin (excellent), beard stroking (deep thought) and idea hamster (person who is employed as a source of new ideas).
Idea Hamsters: People who always seem to have their idea generators running.