to rest on one's laurels

Also found in: Idioms.
to be content with one's past achievements and not strive to continue to excel; as, he didn't rest on his laurels after receiving the Nobel Prize, but went on to made even more significant discoveries.

See also: laurels

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Once significant change is achieved, it's okay to rest on one's laurels as long as the healthy behavior is continued at some level.