Burn the candle at both ends

We worked with some idioms in yesterday class, and I'm not sure whether everybody understood well the meaning of this idiom. Here you have a link that explains the meaning and origin, and also a site you can use to learn and check the meaning of idioms you may come across while studying on your own.

http://www.phrases.org.uk/meanings/burning-the-candle-at-both-ends.html