just deserts


A deserved punishment or reward, as in He got his just deserts when Mary jilted him. This idiom employs desert in the sense of “what one deserves,” a usage dating from the 1300s but obsolete except in this expression.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.