Burning the candle both ends 

To give oral sex and receive anal sex at the same time - a spit roast. The candle in question is a penis, or man made substitute such as a strap-on dildo.

Jon loves burning the candle both ends, it keeps him up all night.

Burning the candle both ends by stusx10 January 11, 2018

burning the candle at both ends 

An English idiom meaning to work long hours without rest. Working late into the night and beginning again early in the morning.

Joe: You're eyes are black sockets, you need some sleep man!

Snowflake: I've been burning the candle at both ends trying to finish this 509 paper.

burning the candle at both ends by mikwat May 24, 2004

Burning the candle at both ends 

Being stricken with a virus or whatever that gives you the shits and makes you puke as well.

I'm so sick! I blew mud and then 10 minutes later I puked my guts out! I'm burning the candle at both ends!

Burning the candle at both ends by C. Felix Reardon December 28, 2005