fair shake, a
An equitable bargain or opportunity, as in You can always count on the boss to give his crew a fair shake. This expression probably alludes to the shaking of dice. [Colloquial; early 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.