lie like an aluminum teaspoon

you can use the phrase (or part of it, the example is below) to define the incipient fall depression (or just depression) when you don't want to do anything but lie on your bed, feeling cold inside and sleep on and on and on...

She hates the overcast weather and the autumn rain, all that makes her lie like an aluminum teaspoon and sometimes get up just only to make some tea.
"Hey, stop lying like an aluminum teaspoon down here, it's his birthday and we're supposed to be there in an hour!"
"Wake me up, when September ends!" - "Sure, you aluminum teaspoon".