Wiktionary
n. (context childish English) The time to sleep
Wikipedia
Sleepytime (foaled 20 February 1994) is an Irish-bred, British-trained Thoroughbred racehorse. In a racing career which lasted from September 1996 to April 1998 she ran six times and won two races. In two races as a two-year-old she won one race, and finished third in the Group One Fillies' Mile at Ascot. On her three-year-old debut she was beaten in the Fred Darling Stakes at Newbury but then won the Classic 1000 Guineas at Newmarket Racecourse. On her only subsequent appearance that year she finished third in the Coronation Stakes. After one unsuccessful run in 1998 she was retired from racing to become a successful broodmare.
Usage examples of "sleepytime".
He started the engine and eased away from the Sleepytime Motel, waiting until he was clear to turn on his headlamps.
At eleven, he left us to check on the Sleepytime and to bring back food.
The bald-headed manager of the Sleepytime in San Jose had told us that two Mexicans and a young girl had been headed to Ocean-side in search of Charteris.
Victor Mature was beginning to warble, but the wetnurse rushed up and gave me a shot of sleepytime before my jack overheated entirely.