rest on (your) laurels

to be so satisfied with your achievements that you make no effort to improve.

Even though you did well on all your exams, you can't simply rest on your laurels.

Etymology: based on the literal meaning of laurels (= a ring of leaves worn on the head in ancient times as a symbol of victory)

• do battle with something
• do best
• do bidding
• do bit
• do by halves
• do credit to
• do credit to someone
• do damnedest
• do dirt
• do dirty work
• do double duty
• do double duty as
• do double duty as something
• do double duty for
• do double duty for something
• do duty as
• do duty as something
• do duty for
• do duty for something
• dog and pony show
• dog days
• dog-eat-dog
• dog eat dog
• dog in the manger
• dog-in-the-manger