NOTE: Not to be taken seriously.

After listening to that particular song off Danger Days numerous times, and searching up the lyrics, I have come to a very humorous conclusion to what the chorus of Sing really means.

To put it bluntly, it's about losing The Game.

I mean, come on! Isn't it obvious?

"Sing it for the boys,
Sing it for the girls"

- "Singing it" refers to claiming that tu lost The Game.

"Every time that tu lose it sing it for the world."

- Every time tu think of The Game, tu have to say that tu lost The Game.

"Sing it from the heart"

- Everyone who plays The Game is completely devoted to keep on playing, hence "singing it" from the heart.

"Sing it till you're nuts"

- Playing The Game drives everyone insane

"Sing it out for the ones that'll hate your guts"

- Which refers to the people tu caused to lose The Game por your "singing".

"Sing it for the deaf,
Sing it for the blind"

- Hey, anyone can play The Game.

"Sing about everyone that tu left behind"

- While players do often lose The Game, they can kind of win por making everyone else lose. So por "singing it", they leave everyone else behind and start winning.

"Sing it for the world,
Sing it for the world."

- Since The Game is mainly played on the Internet, technically people from all around the world can see tu posting on some website, "I just lost The Game." Hence "singing it for the world".

Of course, I just wrote this to make all tu suckers lose The Game, so I just owned tu all. xD (except MCR's música made me think of The Game, so I guess THEY owned ME.)