Citations:sleep camel

Noun: "(slang, idiomatic) a person who habitually goes with little to no sleep during the week and then makes up by sleeping a lot during the weekend"

 * 1999, "Got the time?", The Economist, 24 June 1999:
 * (Silicon Valley has produced a new species of human beings known as “sleep camels”: people who can store up enough sleep at weekends to be able to work flat-out through the week.)
 * 2001, Charles B. Handy, The Elephant and the Flea: Reflections of a Reluctant Capitalist, Harvard Business School Press (2002), ISBN 9781578518227, page 100:
 * No wonder, then, that so many take their laptops to the beach or that 'sleep camels', as they call them in Silicon Valley, those who sleep only at weekends, are becoming more common.
 * 2001, Richard Reeves, Happy Mondays: Putting the Pleasure Back Into Work, Pearson Education Limited (2001), ISBN 9780738206592, unnumbered pages:
 * Silicon Valley has bred 'sleep camels', who store up sleep at the weekends then work long hours all week.
 * 2003, John Micklethwait & Adrian Wooldridge, A Future Perfect: The Challenge and Promise of Globalization, Random House (2003), ISBN 9780812966800, page 235:
 * In Silicon Valley, people talk about "sleep camels"—people who can work throughout the week and then get their rest on weekends.
 * 2004, Russel G. Foster & Leon Kreitzman, Rhythms of Life: The Biological Clocks That Control the Daily Lives of Every Living Thing, Yale University Press (2005), ISBN 9780300109696, page 184:
 * A sleep camel is a person who makes a habit of getting little sleep during the week and tries to make up for it by napping and sleeping in over the weekend.
 * 2014, Rocky F. Catman, Meet Me at the Riverside, Lulu (2014), ISBN 9781483412238, page 198:
 * Sheila told her that John said musicians were like sleep camels when it came to that. They could stay awake for days when they had to.