mail it in
v. phr.— «Experienced horses may cheat or protect themselves during a race (in human sports vernacular they are “mailing it in”).» —by John Lindley Handicapping for Bettor Or Worse Apr. 25, 2004. (source: Double-Tongued Dictionary)
Further reading
It was a dark and stormy night. So begins the long and increasingly convoluted prose of Edwards Bulwer-Lytton’s best-known novel. Today the annual Bulwer-Lytton Contest asks contestants for fanciful first sentences that are similarly...
A librarian opens a book and finds a mysterious invitation scribbled on the back of a business card. Another discovers a child’s letter to the Tooth Fairy, tucked into a book decades ago. What stories are left untold by these forgotten...