lie-down 
noun British
A short rest in which one lies down on a bed, sofa, etc. he felt badly in need of a lie-down...
- I'm so breathless I feel like a lie-down - and all I have done is rearrange the fish on my plate (I'm a vegetarian) and consume a few tiny, tortured vegetables, while occasionally managing to throw in the odd question when he comes up for air.
- I went back to the guesthouse and gave myself the luxury of a lie-down for about an hour, whilst watching some rubbish on television.
- You go out, pound 26 miles like a zombie and you come back and you have something to drink and have a lie-down.