My daughter writes original stories and fic for another fandom. The other day we had the following conversation:
Me: Are you getting sick? You don't look so good.
Her: Gee, thanks. I think I'm just tired.
Me: I don't know. You know I love you, but you look like death warmed over.
Her, perking up: 'Death warmed over'--that's a great phrase. I've got to use that in a story!