This morning, overheard between my husband Teddy and our 18 year old Clara.
Teddy: Honey, you have to stop and get some rest. Between school and work you can’t keep staying out late every night. You’re burning the candle at both ends.
Clara: What candle?
Vampire Maman 
The joys of people not knowing these sayings!!
I’m sure soon there’ll be an up-to-date expression for the kidz. Probably smartphone-related. Like “you’re snapping selfies with both cameras” or something.