4.Dr Spiegel found that men showed a strong relationship between insufficient sleep (defined as fewer than six hours of kip a day) and antibody response.
5." Aberforth's getting a bit annoyed (ratty) , " said Fred, raising his hand in answer to several cries of greeting. " He wants a kip, and his bar's turned into a railway station."
6.Okay. And " kip" , well, I'm not quite sure where that word originates. I can't think of any connection with anything else, so it's just a kip, a little... A little sleep. Again, it may be a very sort of UK type word. Okay.